• A55M-A
• A55M-A/USB3
Motherboard
A55M-A Series
E7969
First Edition
January 2013
Copyright © 2013 ASUSTeK COMPUTER INC. All Rights Reserved.
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ii
Contents
Safety information....................................................................................................... vi
About this guide......................................................................................................... vii
A55M-A Series specifications summary................................................................... ix
Package contents........................................................................................................ xi
Product introduction
1.1
Special features............................................................................................. 1-1
1.1.1
Product highlights............................................................................ 1-1
1.1.3
ASUS Exclusive Features................................................................ 1-2
1.1.2
1.2
1.3
Before you proceed....................................................................................... 1-4
Motherboard overview.................................................................................. 1-5
1.3.1
Placement direction......................................................................... 1-5
1.3.3
Motherboard layout.......................................................................... 1-6
1.3.2
1.4
1.5
1.3.4
1.4.1
1.4.2
1.9
APU installation................................................................................ 1-8
APU heatsink and fan assembly installation.................................... 1-9
1.5.1
Overview........................................................................................ 1-11
1.5.3
Installing a DIMM........................................................................... 1-17
Memory configurations................................................................... 1-12
Expansion slots........................................................................................... 1-18
1.6.1
Installing an expansion card.......................................................... 1-18
1.6.3
PCI slot.......................................................................................... 1-18
1.6.4
1.8
Layout contents................................................................................ 1-7
System memory........................................................................................... 1-11
1.6.2
1.7
Screw holes..................................................................................... 1-5
Accelerated Processing Unit (APU)............................................................. 1-7
1.5.2
1.6
ASUS DIGI+ VRM............................................................................ 1-1
1.6.5
Configuring an expansion card...................................................... 1-18
PCI Express x1 slot........................................................................ 1-18
PCI Express x16 slot...................................................................... 1-18
Jumpers....................................................................................................... 1-20
Connectors................................................................................................... 1-22
1.8.1
1.8.2
Rear panel ports............................................................................ 1-22
Internal connectors........................................................................ 1-23
Software support......................................................................................... 1-29
1.9.1
1.9.2
Installing an operating system....................................................... 1-29
Support DVD information............................................................... 1-29
iii
BIOS information
2.1
Managing and updating your BIOS.............................................................. 2-1
2.1.1
ASUS Update utility......................................................................... 2-1
2.1.3
ASUS CrashFree BIOS 3 utility....................................................... 2-3
2.1.2
2.2
2.3
2.1.4
Main menu.................................................................................................... 2-10
2.3.1
System Language [English]........................................................... 2-10
2.3.3
System Time [xx:xx:xx].................................................................. 2-10
2.3.4
2.4.1
2.4.3
Ai Overclock Tuner [Auto].............................................................. 2-13
Memory Frequency [Auto].............................................................. 2-13
APU Multiplier [Auto]...................................................................... 2-13
NB Frequency [Auto]...................................................................... 2-13
2.4.6
DRAM Timing Control.................................................................... 2-14
2.4.7
2.4.8
2.4.9
2.4.10
EPU Power Saving Mode [Disabled]............................................. 2-13
APU Voltage [Offset Mode]............................................................ 2-14
DRAM Voltage [Auto]..................................................................... 2-14
SB 1.1V Voltage [Auto].................................................................. 2-14
DIGI+ VRM..................................................................................... 2-15
Advanced menu........................................................................................... 2-16
2.5.1
CPU Configuration......................................................................... 2-16
2.5.3
USB Configuration......................................................................... 2-19
2.5.2
2.5.4
2.5.5
2.5.6
2.5.7
SATA Configuration........................................................................ 2-18
NB Configuration............................................................................ 2-19
Onboard Devices Configuration..................................................... 2-20
APM............................................................................................... 2-21
Network Stack................................................................................ 2-22
Monitor menu............................................................................................... 2-23
2.6.1
CPU Temperature / MB Temperature [xxxºC/xxxºF]...................... 2-23
2.6.3
CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage................... 2-23
2.6.2
2.6.4
2.6.5
iv
Security.......................................................................................... 2-10
2.4.4
2.4.5
2.6
System Date [Day xx/xx/xxxx]........................................................ 2-10
Ai Tweaker menu......................................................................................... 2-12
2.4.2
2.5
ASUS BIOS Updater........................................................................ 2-4
BIOS setup program...................................................................................... 2-6
2.3.2
2.4
ASUS EZ Flash 2............................................................................. 2-2
CPU / Chassis fan Speed [xxxx RPM] or [Ignore] / [N/A]............... 2-23
CPU Q-Fan Control [Enabled]....................................................... 2-23
Anti Surge Support [Auto].............................................................. 2-24
2.7
Boot menu.................................................................................................... 2-25
2.7.1
Fast Boot [Enabled]....................................................................... 2-26
2.7.3
Post Delay Time [3 sec]................................................................. 2-27
2.7.2
2.7.4
2.7.5
2.7.6
2.7.7
2.7.8
2.7.9
2.7.10
2.7.11
2.8
2.7.12
Bootup NumLock State [On].......................................................... 2-27
Wait for ‘F1’ If Error [Enabled]........................................................ 2-27
Option ROM Messages [Force BIOS]............................................ 2-27
Interrupt 19 Capture [Postponed]................................................... 2-27
Setup Mode [EZ Mode].................................................................. 2-27
CSM Parameters........................................................................... 2-28
Secure Boot................................................................................... 2-28
Boot Option Priorities..................................................................... 2-29
Boot Override................................................................................. 2-29
Tools menu................................................................................................... 2-30
2.8.1
ASUS EZ Flash 2 Utility................................................................. 2-30
2.8.3
ASUS O.C. Profile.......................................................................... 2-30
2.8.2
2.9
Full Screen Logo [Enabled]............................................................ 2-26
ASUS SPD Information.................................................................. 2-30
Exit menu..................................................................................................... 2-31
Appendices
Notices...................................................................................................................... A-1
ASUS contact information....................................................................................... A-3
Safety information
Electrical safety
•
•
•
•
•
•
To prevent electrical shock hazard, disconnect the power cable from the electrical outlet
before relocating the system.
When adding or removing devices to or from the system, ensure that the power cables
for the devices are unplugged before the signal cables are connected. If possible,
disconnect all power cables from the existing system before you add a device.
Before connecting or removing signal cables from the motherboard, ensure that all
power cables are unplugged.
Seek professional assistance before using an adapter or extension cord. These devices
could interrupt the grounding circuit.
Ensure that your power supply is set to the correct voltage in your area. If you are not
sure about the voltage of the electrical outlet you are using, contact your local power
company.
If the power supply is broken, do not try to fix it by yourself. Contact a qualified service
technician or your retailer.
Operation safety
•
•
•
•
•
•
vi
Before installing the motherboard and adding devices on it, carefully read all the manuals
that came with the package.
Before using the product, ensure all cables are correctly connected and the power
cables are not damaged. If you detect any damage, contact your dealer immediately.
To avoid short circuits, keep paper clips, screws, and staples away from connectors,
slots, sockets and circuitry.
Avoid dust, humidity, and temperature extremes. Do not place the product in any area
where it may become wet.
Place the product on a stable surface.
If you encounter technical problems with the product, contact a qualified service
technician or your retailer.
About this guide
This user guide contains the information you need when installing and configuring the
motherboard.
How this guide is organized
This guide contains the following parts:
•
•
Chapter 1: Product introduction
This chapter describes the features of the motherboard and the new technology it
supports.
Chapter 2: BIOS information
This chapter tells how to change system settings through the BIOS Setup menus.
Detailed descriptions of the BIOS parameters are also provided.
Where to find more information
Refer to the following sources for additional information and for product and software
updates.
1.
2.
ASUS websites
The ASUS website provides updated information on ASUS hardware and software
products. Refer to the ASUS contact information.
Optional documentation
Your product package may include optional documentation, such as warranty flyers,
that may have been added by your dealer. These documents are not part of the
standard package.
vii
Conventions used in this guide
To ensure that you perform certain tasks properly, take note of the following symbols used
throughout this manual.
DANGER/WARNING: Information to prevent injury to yourself when trying to
complete a task.
CAUTION: Information to prevent damage to the components when trying to
complete a task
IMPORTANT: Instructions that you MUST follow to complete a task.
NOTE: Tips and additional information to help you complete a task.
Typography
Bold text
Indicates a menu or an item to select.
Italics
Used to emphasize a word or a phrase.
<Key>
Keys enclosed in the less-than and greater-than sign
means that you must press the enclosed key.
Example: <Enter> means that you must press the Enter or
Return key.
<Key1> + <Key2> + <Key3>
viii
If you must press two or more keys simultaneously, the key
names are linked with a plus sign (+).
A55M-A Series specifications summary
APU
AMD Socket FM2 A-series/Athlon™ Series Processors
AMD® Turbo Core Technology 3.0 support
Microsoft® DirectX® 11 support
• Refer to www.asus.com for the AMD® APU support list.
Chipset
AMD® A55 FCH (Hudson D2)
Memory
2 x 240-pin DIMM3 slots support maximum 32GB unbuffered non-ECC
DDR3 1866 / 1600 / 1333 / 1066 MHz memory modules
Dual-channel memory architecture
Supports AMD Memory Profile (AMP) memory
•The maximum 32GB memory capacity can be supported with 16GB or above
DIMMs. ASUS will update the memory QVL once the DIMMs are available in the
market.
• Refer to www.asus.com for the latest Memory QVL (Qualified Vendors List).
•When you install a total memory of 4GB capacity or more, Windows® 32-bit
operating system may only recognize less than 3GB. We recommend a
maximum of 3GB system memory if you are using a Windows® 32-bit operating
system.
Graphics
Integrated AMD® Radeon™ HD 7000 Series Graphics in the A-Series APU
Supports HDMI with a maximum resolution of 1920x1080@60Hz
Supports Dual-link DVI with a maximum resolution of 2560x1600@60Hz
Supports D-Sub with a maximum resolution of 1920x1600@60Hz
AMD® Dual Graphics technology support*
Maximum shared memory of 2GB
Supports Microsoft® DirectX 11
• Refer to http://www.amd.com/us/products/technologies/dual-graphics/
Pages/dual-graphics.aspx#3 for the discrete GPUs which support Dual Graphics
technology.
Expansion slots
1 x PCIe 2.0 x16 slot
1 x PCIe 2.0 x1 slots
1 x PCI slot
Storage / RAID
AMD® A55 FCH:
LAN
Realtek® 8111F PCIe Gigabit LAN controller
Audio
Realtek® ALC887-VD 8-channel High Definition Audio CODEC
USB
A55M-A/USB3
- 6 x Serial ATA 3.0Gb/s connectors support RAID 0, RAID 1, RAID 10
and JBOD configurations
• Use a chassis with HD audio module in the front panel to support an 8-channel
audio output.
ASMedia 1042
- 2 x USB 3.0/2.0 ports at the back panel
AMD® A55 FCH:
- 6 x USB 2.0/1.1 ports (4 ports at the mid-board, 2 ports at the back
panel)
A55M-A
AMD® A55 FCH:
- 8 x USB 2.0/1.1 ports (4 ports at the mid-board, 4 ports at the back
panel)
(continued on the next page)
ix
A55M-A Series specifications summary
ASUS unique
features
ASUS USB 3.0 Boost (A55M-A/USB3 only)
DIGI+ Power Control: Digital Power Design for the APU
ASUS 3+2 Phase Power Design
Network iControl
ASUS EPU
ASUS AI Suite II
ASUS UEFI BIOS EZ Mode
ASUS Anti-Surge Protection
ASUS Fan Xpert
ASUS CrashFree BIOS 3
ASUS Fanless Design: Stylish Heatsink Solution
ASUS ESD
ASUS EZ Flash 2
ASUS MyLogo 2™
100% All high-quality conductive polymer
Back Panel I/O
ports
1 x PS/2 mouse port (green)
1 x PS/2 keyboard port (purple)
1 x HDMI port
1 x DVI port
1 x D-Sub output port
1 x LAN (RJ-45) port
2 x USB 3.0 ports and 2 x USB 2.0/1.1 ports (A55M-A/USB3 only)
4 x USB 2.0/1.1 ports (A55M-A only)
8-channel audio I/O ports (3-jack)
Internal I/O
connectors /
buttons / switches
2 x USB 2.0/1.1 connectors support additional 4 USB 2.0/1.1 ports
6 x SATA 3.0Gb/s connectors
1 x System panel connector
1 x Internal Speaker connector
1 x CPU fan connector (4-pin)
1 x S/PDIF output connector
1 x Chassis fan connector (3-pin)
1 x High-definition front panel audio connector
1 x 24-pin EATX power connector
1 x 4-pin ATX 12V power connector
BIOS
32 Mb Flash ROM, UEFI AMI BIOS, PnP, DMI 2.0, WfM 2.0, SM BIOS
2.6, ACPI 2.0a, Multi-language BIOS
Support DVD
Drivers
ASUS Update
ASUS utilities
Anti-Virus software (OEM version)
Form factor
uATX form factor: 23.6cm x 18.8cm
Specifications are subject to change without notice.
Package contents
Check your motherboard package for the following items.
CPU_FAN CHA_FAN
KBMS
DIGI
+VRM
ATX12V
USB1112
DDR3 DIMM_B1 (64bit, 240-pin module)
DDR3 DIMM_A1 (64bit, 240-pin module)
SOCKET FM2
DVI_VGA
HDMI
LAN1_USB12
EATXPWR
ASM
1042
AUDIO
KB_USBWB
A55M-A/USB3
PCIEX16
RTL
8111F
SATA6G_5 SATA6G_6
AMD®
A55
BATTERY
PCIEX1_1
SATA6G_3 SATA6G_4
Super
I/O
PCI1
SB_PWR
SATA6G_1 SATA6G_2
ALC
887
USBPWF
SPDIF_OUT
AAFP
USB56
USB34
32Mb
BIOS
CLRTC SPEAKER
F_PANEL
ASUS A55M-A Series motherboard
2 x Serial ATA 3.0 Gb/s
cables
ide
User Gu
1 x I/O Shield
User Guide
Support DVD
•
A55M-A Series motherboards include A55M-A and A55M-A/USB3 models. The
package contents vary from models.
•
If any of the above items is damaged or missing, contact your retailer.
•
The illustrated items above are for reference only. Actual product specifications may
vary with different models.
xi
xii
Product introduction
1.1
Special features
1.1.1
Product highlights
1
AMD A-series accelerated processors with AMD® Radeon™ HD 7000 series
graphics
®
This motherboard supports AMD® A-series accelerated processors with AMD® Radeon™
HD 7000 series graphics. This revolutionary APU (Accelerated Processing Unit) combines
processing power and advanced DirectX 11 graphics in one small, energy-efficient design to
enable accelerated performance and an industry-leading visual experience. It features Dualchannel DDR3 memory support and accelerated data transfer rates of up to 5GT/s.
AMD® A55 FCH chipset
AMD® A55 FCH is designed to support up to 5GT/s interface speed and 6 x SATA 3.0Gb/s
ports.
Dual-Channel DDR3 1866 / 1600 / 1333 / 1066 MHz Support
This motherboard supports dual-channel DDR3 memory with data transfer rates of DDR3
1866 / 1600 / 1333 / 1066 MHz to boost the system’s performance, and to meet the higher
bandwidth requirements of 3D graphics, multimedia, and Internet applications.
100% All High-quality Conductive Polymer Capacitors
This motherboard uses all high-quality conductive polymer capacitors for durability, improved
lifespan, and enhanced thermal capacity.
1.1.2
ASUS DIGI+ VRM
DIGI+POWER CONTROL: Digital Power Design for the APU*
ASUS motherboards using the AMD® A55 chipset employ precise digital voltage regulation
for the APU, called DIGI+ VRM (Voltage Regulation Modules) digital power design. The APU
voltage is adjusted either through carefully developed automated modes, or by using userdefined profiles. The result is that DIGI+ VRM technology ensures better energy efficiency
and precise power delivery. Boosted by world-renowned ASUS quality, DIGI+ VRM creates
an ideal computing platform for a diverse range of applications, from gaming to multimedia
or office work and heavy multitasking. Engineered and tested to assure unmitigated
performance, ASUS A55 boards with DIGI+ VRM remain efficient and accurate for reliable
performance in every scenario.
* DIGI+ VRM features are also available in FM2 socket compatible CPUs
ASUS A55M-A Series
1-1
1.1.3
ASUS Exclusive Features
ASUS Network iControl
With a single-click on/off button, the application currently in use has its data and network
badndwidth prioritized over other programs. Moreover, you can prioritize your favorite
software easily by configuring profiles through the inuitive user interface. Within the profile,
programs can be prescheduled to run during a specific time period to avoid network
congestion and long-waits for downloads. Auto PPPoE network connection povides a onestep setup for enhanced online convenience. Overall, it’s an intuitive network bandwidth
control center.
ASUS UEFI BIOS (EZ Mode)
ASUS UEFI BIOS, a UEFI compliant architecture, offers the first mouse-controlled intuitive
graphical BIOS interface that goes beyond the traditional keyboard-only BIOS controls,
providing you with more flexibility, convenience, and easy to navigate EFI BIOS than the
traditional BIOS versions. It offers you with dual selectable modes and native support for hard
drives larger than 2.2 TB.
ASUS UEFI BIOS includes the following new features:
•
F12 BIOS snapshot hotkey
•
F3 Shortcut for most accessed information
•
ASUS DRAM SPD (Serial Presence Detect) information detecting faulty DIMMs, and
helping with difficult POST situations.
EPU
EPU (Energy Processing Unit), the world’s first real-time system power-saving chip,
automatically detects the current system load and intelligently moderates power usage.
It offers a total system-wide energy optimization, reduces fan noise, and extends the
component’s lifespan.
ASUS Anti-Surge Protection
This special design protects expensive devices and the motherboard from damage caused
by power surges from switching power supply unit (PSU).
AI Suite II
With its user interface, ASUS AI Suite II integrates several ASUS utilities and allows you to
launch and operate these utilities simultaneously. It allows you to configure the overclocking
settings, adjust the frequencies and related voltages, remotely control the system via a
mobile device, and other easy-to-use helpful utilities.
ASUS Fan Xpert
ASUS Fan Xpert intelligently allows you to adjust the CPU fan speed based on different
ambient temperatures, resulting in a quiet and cool computing environment.
ASUS EZ Flash 2
ASUS EZ Flash 2 is a user-friendly utility that allows you to update the BIOS without using a
bootable floppy disk or an OS-based utility.
1-2
Chapter 1: Product introduction
ASUS MyLogo2™
Turn your favorite photos into 256-color boot logos to personalize your system.
ASUS CrashFree BIOS 3
ASUS CrashFree BIOS 3 allows you to restore a corrupted BIOS file from a USB storage
device that contains the BIOS file.
USB 3.0 Boost (A55M-A/USB3 only)
With USB 3.0 Boost technology, a USB device’s transmission speed is significantly
increased, adding to an already impressive USB 3.0 transfer speed. ASUS software
automatically accelerates data speeds for compatible USB 3.0 peripherals without the need
for any user interaction.
ASUS A55M-A Series
1-3
1.2
Before you proceed
Take note of the following precautions before you install motherboard components or change
any motherboard settings.
•
Unplug the power cord from the wall socket before touching any component.
•
Before handling components, use a grounded wrist strap or touch a safely grounded
object or a metal object, such as the power supply case, to avoid damaging them due
to static electricity.
•
Hold components by the edges to avoid touching the ICs on them.
•
Whenever you uninstall any component, place it on a grounded antistatic pad or in the
bag that came with the component.
•
Before you install or remove any component, switch off the ATX power supply and
detach its power cord. Failure to do so may cause severe damage to the motherboard,
peripherals, or components.
Standby Power LED
The motherboard comes with a standby power LED that lights up to indicate that the system
is ON, in sleep mode, or in soft-off mode. This is a reminder that you should shut down
the system and unplug the power cable before removing or plugging in any motherboard
component. The illustration below shows the location of the onboard LED.
SB_PWR
A55M-A/USB3
ON
Standby Power
OFF
Powered Off
A55M-A/USB3 Onboard LED
1-4
Chapter 1: Product introduction
1.3
Motherboard overview
1.3.1
Placement direction
1.3.2
Screw holes
When installing the motherboard, ensure that you place it into the chassis in the correct
orientation. The edge with external ports goes to the rear part of the chassis as indicated in
the image below.
Place six screws into the holes indicated by circles to secure the motherboard to the chassis.
DO NOT overtighten the screws! Doing so can damage the motherboard.
Place this side towards
the rear of the chassis.
A55M-A/USB3
ASUS A55M-A Series
1-5
1.3.3
Motherboard layout
A55M-A Series motherboards include A55M-A and A55M-A/USB3 models. The package
contents vary between models. The layout illustrations in this user guide are for A55MA/USB3 only.
1
2
3
4
5
18.8cm(7.4in)
CPU_FAN CHA_FAN
KBMS
DIGI
+VRM
ATX12V
23.6cm(9.3in)
USB1112
DDR3 DIMM_B1 (64bit, 240-pin module)
DDR3 DIMM_A1 (64bit, 240-pin module)
SOCKET FM2
DVI_VGA
HDMI
LAN1_USB12
AUDIO
EATXPWR
ASM
1042
KB_USBWB
A55M-A/USB3
2
PCIEX16
RTL
8111F
SATA6G_5 SATA6G_6
AMD®
A55
BATTERY
PCIEX1_1
SATA6G_3 SATA6G_4
Super
I/O
6
PCI1
SB_PWR
SATA6G_1 SATA6G_2
ALC
887
USBPWF
SPDIF_OUT
CLRTC SPEAKER
AAFP
14
1-6
32Mb
BIOS
USB34
USB56
F_PANEL
13 12
11
10
9
7
8
Chapter 1: Product introduction
1.3.4
Layout contents
Connectors/Jumpers/Slots/LED
Page
2. ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
1-24
1. Keyboard power (3-pin KB_USBPWB)
3. AMD FM2 socket
4. CPU fan connector (4-pin CPU_FAN) and Chassis fan connector (3-pin CHA_FAN)
5. DDR3 DIMM slots
6. SATA 3.0Gb/s connectors (7-pin SATA3G_1~6)
7. System panel connector (10-1 pin F_PANEL)
8. Speaker connector (4-pin SPEAKER)
9. Clear RTC RAM (3-pin CLRTC)
10. USB 2.0 connectors (10-1 pin USB56, USB34)
11. USB device wake-up (3-pin USBPWF)
12. Digital audio connector (4-1 pin SPDIF_OUT)
13. Front panel audio connector (10-1 pin AAFP)
14. Standby power LED (SB_PWR)
1.4
1-21
1-7
1-23
1-11
1-25
1-26
1-26
1-20
1-28
1-21
1-27
1-27
1-4
Accelerated Processing Unit (APU)
This motherboard comes with an FM2 socket designed for AMD® A-series accelerated
processors with AMD® Radeon™ HD 7000 series graphics.
Ensure that you use a APU designed for the FM2 socket. The APU fits in only one correct
orientation. DO NOT force the APU into the socket to prevent bending the pins and
damaging the APU!
A55M-A/USB3
A55M-A/USB3 CPU socket FM2
ASUS A55M-A Series
1-7
1.4.1
1
3
1-8
APU installation
2
4
Chapter 1: Product introduction
1.4.2
APU heatsink and fan assembly installation
Apply the Thermal Interface Material
to the APU heatsink and APU before
you install the heatsink and fan if
necessary.
To install the APU heatsink and fan assembly
1
2
3
4
ASUS A55M-A Series
5
1-9
To uninstall the APU heatsink and fan assembly
1
3
2
4
5
1-10
Chapter 1: Product introduction
1.5
System memory
1.5.1
Overview
This motherboard comes with two Double Data Rate 3 (DDR3) Dual Inline Memory Modules
(DIMM) sockets.
A DDR3 module has the same physical dimensions as a DDR2 DIMM but is notched
differently to prevent installation on a DDR2 DIMM socket. DDR3 modules are developed for
better performance with less power consumption.
DIMM_A1
DIMM_B1
The figure illustrates the location of the DDR3 DIMM sockets:
A55M-A/USB3
Channel
Channel A
Channel B
Sockets
DIMM_A1
DIMM_B1
A55M-A/USB3 240-pin DDR3 DIMM sockets
ASUS A55M-A Series
1-11
1.5.2
Memory configurations
You may install 1GB, 2GB, 4GB, and 8GB unbuffered non-ECC DDR3 DIMMs into the DIMM
sockets.
•
You may install varying memory sizes in Channel A and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel configuration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
•
Always install DIMMs with the same CAS latency. For optimal compatibility, we
recommend that you install memory modules of the same version or date code (D/C)
from the same vendor. Check with the retailer to get the correct memory modules.
•
Due to the memory address limitation on 32-bit Windows® OS, when you install 4GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you do any of the
following:
-Install a maximum of 3GB system memory if you are using a 32-bit Windows®
OS.
-Use a 64-bit Windows® OS if you want to install 4GB or more memory on the
motherboard.
•
This motherboard does not support DIMMs made up of 512Mb (64MB) chips or less.
•
The maximum 32GB memory capacity can be supported with 16GB or above DIMMs.
ASUS will update the memory QVL once the DIMMs are available in the market.
•
The default memory operation frequency is dependent on its Serial Presence Detect
(SPD), which is the standard way of accessing information from a memory module.
Under the default state, some memory modules for overclocking may operate at a
lower frequency than the vendor-marked value. To operate at the vendor-marked
or at a higher frequency, refer to section 2.4 Ai Tweaker menu for manual memory
frequency adjustment.
•
For system stability, use a more efficient memory cooling system to support a full
memory load (2 DIMMs) or overclocking condition.
A55M-A Series Motherboard Qualified Vendors Lists (QVL)
DDR3 1866 MHz capability
1-12
DIMM socket
Voltage support (Optional)
1 DIMM 2 DIMMs
9-9-9-24
1.65V
•
•
9-10-9-27 1.50V
•
•
9-10-9-28 1.5V
•
•
10-11-10-30 1.5V
•
•
1.65V
•
•
1.65V
•
•
1.5V
•
•
1.65V
•
•
Vendors
Part No.
Size
SS/DS Chip
Brand
Chip NO. Timing
CORSAIR
CORSAIR
G.SKILL
G.SKILL
KINGSTON
KINGSTON
KINGSTON
KINGSTON
CMT6GX3MA1866C9(XMP)
CMZ8GX3M2A1866C9(XMP)
F3-14900CL9Q-16GBZL(XMP1.3)
F3-14900CL10Q2-64GBZLD(XMP1.3)
KHX1866C9D3K4/16GX(XMP)
KHX1866C9D3T1K3/6GX(XMP)
KHX1866C11D3P1K2/8G
KHX1866C9D3K2/8GX(XMP)
6GB(3 x 2GB)
8GB(2 x 4GB)
16GB(4GB x 4)
64GB(8GB x 8)
16GB(4GB x 4)
6GB(3 x 2GB)
8GB(4GB x 2)
8GB(4GB x 2)
DS
DS
DS
DS
DS
DS
DS
DS
-
-
Chapter 1: Product introduction
DDR3 1600 MHz capability
Voltage
-
.
DS
-
.
.
DS
-
-
8-8-8-24
1.65V
.
.
DS
-
-
10-10-10-27 1.50V
.
.
DS
-
-
8-8-8-24
1.65V
.
.
DS
-
-
9-9-9-24
1.65V
.
.
DS
-
-
7-8-7-20
1.65V
.
.
DS
-
-
9-9-9-24
1.65V
.
.
DS
-
-
9-9-9-24
1.65V
.
.
DS
-
-
8-8-8-24
1.65V
.
.
DS
-
-
8-8-8-24
1.65V
.
.
DS
-
-
9-9-9-24
1.65V
.
.
DS
-
-
9-9-9-24
1.65V
.
.
DS
-
-
7-8-7-20
1.50V
.
.
DS
-
-
9-9-9-24
1.65V
.
.
DS
-
-
-
-
.
.
DS
-
-
7-7-8-24
XMP1.35V
.
.
DS
-
-
9-9-9-24
XMP1.35V
.
.
DS
-
-
9-9-9-24
1.5V
.
.
DS
-
-
8-8-8-24
XMP1.35V
.
.
F3-12800CL9D-8GBRL(XMP)
12GB
(6x2GB)
32GB
(8GBx4)
4GB
(2 x 2GB)
4GB
(2 x 2GB)
4GB
(2 x 2GB)
4GB
(2 x 2GB)
4GB
(2 x 2GB)
6GB
(3 x 2GB)
6GB
(3 x 2GB)
6GB
(3 x 2GB)
8GB
(2 x 4GB)
8GB
(2 x 4GB)
8GB
(4 x 2GB)
6GB
(3 x 2GB)
4GB
(2 x 2GB)
4GB
(2 x 2GB)
4GB
(2 x 2GB)
8GB
(2 x 4GB)
8GB
(2 x 4GB)
A-DATA 3CCD-1509A
EL1126T
Apacer AM5D5908DEQSCK KZZC
DIMM socket
support
(optional)
1DIMM 2DIMMs
DS
-
-
9-9-9-24
1.5V
.
.
HYNIX
HMT351U6CFR8C-PB
4GB
DS
HYNIX
-
-
.
.
KINGMAX
FLGE85F-B8KJ9A FEIS(XMP)
DS
-
H5TQ2G83CFR
PBC
-
-
1.5V
.
.
SS
-
-
-
1.5V
.
.
DS
-
-
9-9-9-27
1.65V
.
.
DS
-
-
9-9-9-27
1.65V
.
.
DS
-
-
-
1.65V
.
.
DS
-
-
-
1.5V
.
.
DS
-
-
-
1.5V
.
.
DS
DS
KTC
D1288JPNDPLD9U
11-11-11-28
1.65V
1.35V-1.5V
.
.
.
.
Vendors
Part No.
Size
SS/
DS
Chip
Brand
A-DATA
AM2U16BC2P1
2GB
SS
Apacer
78.B1GE3.9L10C
4GB
CORSAIR
CMD12GX3M6A1600C8(XMP)
CORSAIR
CMZ32GX3M4X1600C10(XMP)
CORSAIR
CMP4GX3M2A1600C8(XMP)
CORSAIR
CMP4GX3M2A1600C9(XMP)
CORSAIR
CMP4GX3M2C1600C7(XMP)
CORSAIR
CMX4GX3M2A1600C9(XMP)
CORSAIR
CMX4GX3M2A1600C9(XMP)
CORSAIR
TR3X6G1600C8 G(XMP)
CORSAIR
TR3X6G1600C8D G(XMP)
CORSAIR
TR3X6G1600C9 G(XMP)
CORSAIR
CMP8GX3M2A1600C9(XMP)
CORSAIR
CMZ8GX3M2A1600C7R(XMP)
CORSAIR
CMX8GX3M4A1600C9(XMP)
Crucial
BL25664BN1608.16FF(XMP)
G.SKILL
F3-12800CL7D-4GBECO(XMP)
G.SKILL
F3-12800CL9D-4GBECO(XMP)
G.SKILL
F3-12800CL9D-4GBRL(XMP)
G.SKILL
F3-12800CL8D-8GBECO(XMP)
G.SKILL
KINGSTON
KINGSTON
KINGSTON
KINGSTON
KINGSTON
KINGSTON
KINGSTON
KINGSTON
2GB
4GB
KHX1600C9D3P1K2/4G
(2 x 2GB)
12GB
KHX1600C9D3K3/12GX(XMP)
(3x4GB)
KHX1600C9D3T1BK3/12GX(XMP) 12GB
(3x4GB)
16GB
KHX1600C9D3K4/16GX(XMP)
(4GBx4)
16GB
KHX1600C10D3B1K2/16G
(8GBx2)
16GB
KHX16C9K2/16
(8GBx2)
KHX1600C9AD3/2G
2GB
KVR1600D3N11/2G-ES
2GB
ASUS A55M-A Series
Chip No.
Timing
1-13
DDR3 1600 MHz capability
SS/
DS
Chip
Brand
Chip No.
Timing
DIMM socket
support
Voltage (optional)
1DIMM 2DIMMs
KINGSTON
DS
-
-
-
1.65V
.
.
KINGSTON
DS
-
-
8
1.65V
.
.
DS
-
-
8
1.65V
.
.
DS
-
-
9
1.65V
.
.
DS
-
-
9
XMP
1.35V
.
.
DS
-
-
9-9-9-27
1.65V
.
.
DS
-
-
-
1.65V
.
.
DS
-
-
9
1.65V
.
.
DS
-
-
9-9-9-27
1.65V
.
.
DS
-
-
9-9-9-27
1.65V
.
.
DS
-
-
-
1.5V
.
.
DS
SS
DS
SS
DS
DS
HYNIX
AMD
Asint
Asint
Asint
H5TQ2G83BFR PBC
23EY4587MB6H11503M
23EY4587MB6H11503M
SLZ302G08-GN1C
SLA302G08-GN1C
SLB304G08-GN1B
9-9-9-24
9-9-9-24
-
1.5V
1.5V
-
.
.
.
.
.
.
.
.
DS
-
-
-
-
.
.
DS
-
-
9-9-9-24
1.65V
.
.
DS
S-POWER 20YT5NG-1201
-
-
.
.
Vendors
Part No.
Size
KHX1600C7D3K2/4GX(XMP) 4GB
(2x2GB)
KHX1600C8D3K2/4GX(XMP) 4GB
(2x2GB)
KHX1600C8D3T1K2/4GX
4GB
KINGSTON
(XMP)
(2x2GB)
KINGSTON
KHX1600C9D3K2/4GX(XMP) 4GB
(2x2GB)
KHX1600C9D3LK2/4GX
4GB
KINGSTON
(XMP)
(2x2GB)
KHX1600C9D3X2K2/
4GB
KINGSTON
4GX(XMP)
(2x2GB)
KHX1600C9D3T1K3/6GX
6GB
KINGSTON
(XMP)
(3x2GB)
KINGSTON
KHX1600C9D3K3/6GX(XMP) 6GB
(3x2GB)
KHX1600C9D3T1BK3/
6GB
KINGSTON
6GX(XMP)
(3x2GB)
KINGSTON
KHX1600C9D3K2/8GX(XMP) 8GB
(2x4GB)
8GB
KINGSTON
KHX1600C9D3P1K2/8G
(2x4GB)
SanMax
SMD-4G68HP-16KZ
4GB
AMD
AE32G1609U1-U
2GB
AMD
AE34G1609U2-U
4GB
ASint
SLZ302G08-EGN1C
2GB
ASint
SLA302G08-EGN1C
4GB
ASint
SLB304G08-EGN1B
8GB
M2P2G64CB8HC9N-DG
Elixir
2GB
(XMP)
32GB
PATRIOT
PGD316G1600ELK(XMP)
(8GBx4)
Silicon Power SP004GBLTU160V02(XMP)
4GB
DDR3 1333 MHz capability
Vendors
Part No.
Size
SS/
DS
Chip
Brand
Chip No.
Timing
Voltage
A-DATA
A-DATA
A-DATA
A-DATA
ADATA
-
3CCD-1509HNA1126L
3CCD-1509A EL1127T
-
-
SS
-
-
9-9-9-24
DS
DS
DS
DS
DS
DS
ADATA
ELPIDA
Apacer
Apacer
Apacer
Apacer
3CCD-1509A EL1127T
J4208BASE-DJ-F
AM5D5808DEWSBG
AM5D5808FEQSBG
AM5D5808APQSBG
AM5D5908CEHSBG
9
-
1.5V
1.25V-1.35V
(low voltage)
-
CORSAIR
TR3X6G1333C9 G
SS
-
-
9-9-9-24
CORSAIR
TW3X4G1333C9D G
DS
-
-
9-9-9-24
CORSAIR
CORSAIR
Crucial
DS
DS
DS
Crucial
CM3X4GA1333C9N2
CMX4GX3M1A1333C9
CT25664BA1339.16FF
BL25664BN1337.16FF
(XMP)
2GB
2GB
2GB
4GB
(2x2GB)
4GB
8GB
2GB
2GB
2GB
4GB
6GB
(3x2GB)
4GB
(2x2GB)
4GB
4GB
2GB
6GB
(3x2GB)
SS
SS
SS
A-DATA
A-DATA
Apacer
Apacer
Apacer
Apacer
AD3U1333C2G9
AM2U139C2P1
AX3U1333C2G9-BP
AXDU1333GC2G9-2G
(XMP)
AM2U139C4P2
SU3U1333W8G9-B
78.A1GC6.9L1
78.A1GC6.9L1
AU02GFA33C9NBGC
78.B1GDE.9L10C
ELPIDA
EBJ21UE8EDF0-DJ-F
2GB
G.SKILL
F3-10666CL8D4GBECO(XMP)
F3-10666CL7D8GBRH(XMP)
4GB
(2x2GB)
8GB
(2x4GB)
A-DATA
G.SKILL
1-14
.
.
.
DIMM socket
support
(optional)
1DIMM 2DIMMs
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1.50V
.
.
1.50V
.
.
CORSAIR 256MBDCJGELC0401136 9-9-9-24
9-9-9-24
Micron
9KF27D9KPT
9
1.50V
-
.
.
.
.
.
.
DS
-
-
7-7-7-24
1.65V
.
.
DS
ELPIDA
J1108EDSE-DJ-F
-
1.35V
(low voltage)
.
.
DS
-
-
8-8-8-8-24 XMP 1.35V
.
.
DS
-
-
7-7-7-21
.
.
1.5V
Chapter 1: Product introduction
DDR3 1333 MHz capability
Vendors
Part No.
Size
SS/
DS
Chip Brand Chip No.
Timing
Voltage
GEIL
GV34GB1333C9DC
DS
-
-
9-9-9-24
1.5V
.
.
GEIL
GVP34GB1333C7DC
4GB
(2x2GB)
4GB
(2x2GB)
DIMM socket
support(optional)
1DIMM 2DIMMs
DS
-
-
7-7-7-24
1.5V
.
.
Hynix
HMT125U6TFR8A-H9
2GB
DS
Hynix
H5TC1G83TFRH9A
-
.
.
Hynix
KINGMAX
KINGMAX
KINGMAX
KINGMAX
KINGMAX
KINGMAX
KINGSTON
KINGSTON
KINGSTON
KINGSTON
KINGSTON
KINGSTON
KINGSTON
4GB
2GB
2GB
2GB
2GB
4GB
4GB
2GB
2GB
2GB
2GB
2GB
2GB
2GB
4GB
(2x2GB)
4GB
4GB
4GB
4GB
4GB
2GB
2GB
DS
SS
SS
SS
DS
DS
DS
SS
SS
DS
DS
DS
DS
DS
Hynix
KINGMAX
KINGMAX
KINGMAX
KINGMAX
KINGMAX
KINGMAX
Micron
ELPIDA
ELPIDA
KTC
ELPIDA
KTC
KINGSTON
H5TQ2G83BFRH9C
KFC8FMFXF-DXX-15A
KFC8FNLXF-DXX-15A
KFC8FNMXF-BXX-15A
KKB8FNWBFGNX-26A
KFC8FNLXF-DXX-15A
KFC8FNMXF-BXX-15A
IID77 D9LGK
J2108BCSE-DJ-F
J1108BFBG-DJ-F
D1288JPNDPLD9U
J1108BDSE-DJ-F
D1288JEMFNGD9U
D1288JPSFPGD9U
9
9
9
-
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
DS
-
-
7
1.65V
.
.
DS
DS
DS
DS
DS
SS
SS
ELPIDA
ELPIDA
KTC
Hynix
KINGSTON
Micron
MICRON
J2108BCSE-DJ-F
J2108BCSE-DJ-F
D2568JENCNGD9U
H5TQ2G83AFR
D2568JENCPGD9U
OJD12D9LGK
IJM22 D9PFJ
9
-
1.5V
1.5V
1.5V
1.5V
-
.
.
.
.
.
.
.
.
.
.
.
.
.
.
2GB
DS
Micron
9KF27D9KPT
9
-
.
.
4GB
DS
Micron
OLD22D9LGK
-
-
.
.
NANYA
PSC
SAMSUNG
SAMSUNG
SAMSUNG
Super Talent
Super Talent
HMT351U6BFR8C-H9
FLFE85F-C8KF9 CAES
FLFE85F-C8KL9 NAES
FLFE85F-C8KM9 NAES
FLFE85F-B8KL9 NEES
FLFF65F-C8KL9 NEES
FLFF65F-C8KM9 NEES
KVR1333D3S8N9/2G
KVR1333D3S8N9/2G-SP
KVR1333D3N9/2G
KVR1333D3N9/2G
KVR1333D3N9/2G
KVR1333D3N9/2G-SP
KVR1333D3N9/2G-SP
KHX1333C7D3K2/
4GX(XMP)
KVR1333D3N9/4G
KVR1333D3N9/4G
KVR1333D3N9/4G
KVR1333D3N9/4G
KVR1333D3N9/4G-SP
MT8JTF25664AZ-1G4D1
MT8JTF25664AZ-1G4M1
MT16JTF25664AZ1G4F1
MT16JTF51264AZ1G4D1
NT4GC64B8HG0NF-CG
AL8F8G73F-DJ2
M378B5773DH0-CH9
M378B5673FH0-CH9
M378B5273CH0-CH9
W1333UB2GS
W1333UB4GS
1.35V
(low voltage)
1.5V
1.5V
1.5V
1.5V
1.5V
1.5V
1.5V
DS
DS
SS
DS
DS
DS
DS
NANYA
PSC
SAMSUNG
SAMSUNG
SAMSUNG
SAMSUNG
SAMSUNG
NT5CB256M8GN-CG
A3P1GF3FGF
K4B2G0846D
K4B1G0846F
K4B2G0846C
K4B1G0846F
K4B2G0846C
9
-
-
.
.
.
.
.
.
.
.
.
.
.
.
.
.
Super Talent
W1333UX6GM
DS
Micron
0BF27D9KPT
9-9-9-24
1.5V
.
.
KINGSTEK
AMD
AMD
ASint
ASint
ASint
Elixir
Elixir
Elixir
Elixir
Elixir
KSTD3PC-10600
AE32G1339U1-U
AE34G1339U2-U
SLZ302G08-EDJ1C
SLA302G08-EDJ1C
SLB304G08-EDJ1B
M2F2G64CB88B7N-CG
M2F2G64CB88D7N-CG
M2F2G64CB88G7N-CG
M2F4G64CB8HB5N-CG
M2F4G64CB8HD5N-CG
4GB
2GB
2GB
2GB
4GB
2GB
4GB
6GB
(3x2GB)
2GB
2GB
4GB
2GB
4GB
8GB
2GB
2GB
2GB
4GB
4GB
SS
SS
DS
SS
DS
DS
SS
SS
SS
DS
DS
MICRON
AMD
AMD
Asint
Asint
Asint
Elixir
Elixir
Elixir
Elixir
Elixir
PE911-125E
23EY4587MB3H11503M
23EY4587MB3H11503M
SLZ302G08-DJ1C
SLA302G08-DJ1C
SLB304G08-DJ1B
N2CB2G80BN-CG
N2CB2G80DN-CG
N2CB2G80GN-CG
N2CB2G80BN-CG
N2CB2G80DN-CG
9-9-9-24
9-9-9-24
-
1.5V
1.5V
-
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
KINGSTON
KINGSTON
KINGSTON
KINGSTON
KINGSTON
KINGSTON
Micron
Micron
Micron
Micron
ASUS A55M-A Series
.
.
.
.
1-15
DDR3 1333 MHz capability
Vendors
Part No.
Size
SS/DS Chip Brand
Chip No.
Timing
KINGSHARE
KSRPCD313332G
2GB
DS
PATRIOT
-
Kingtiger
2GB DIMM PC3-10666
2GB
DS
SAMSUNG
-
-
Kingtiger
MARKVISION
MARKVISION
PATRIOT
PATRIOT
RAMAXEL
RAMAXEL
RiDATA
RiDATA
Silicon Power
Silicon Power
Silicon Power
TAKEMS
TAKEMS
TAKEMS
UMAX
WINTEC
KTG2G1333PG3
BMD32048M1333C9-1123
BMD34096M1333C9-1124
PSD32G13332H
PG38G1333EL(XMP)
RMR1870ED48E8F-1333
RMR1870EC58E9F-1333
C304627CB1AG22Fe
E304459CB1AG32Cf
SP002GBLTU133V02
SP002GBLTU133S02
SP004GBLTU133V02
TMS2GB364D081-107EY
TMS2GB364D081-138EY
TMS2GB364D082-138EW
E41302GP0-73BDB
3WVS31333-2G-CNR
2GB
2GB
4GB
2GB
8GB
2GB
4GB
2GB
4GB
2GB
2GB
4GB
2GB
2GB
2GB
2GB
2GB
DS
DS
DS
DS
DS
DS
DS
DS
DS
SS
DS
DS
DS
DS
DS
DS
DS
MARKVISION
MARKVISION
ELPIDA
ELPIDA
RiDATA
RiDATA
S-POWER
Elixir
S-POWER
UMAX
AMPO
PM128M8D385-15
SEC 904 HCH9
K4B1G0846D
M3D1288P-13
M3D2568E-13
J1108BDBG-DJ-F
J2108BCSE-DJ-F
N/A
N/A
20YT3NG-1202
N2CB1680AN-C6
20YT3NG-1201
U2S24D30TP-13
AM3420803-13H
DIMM socket
Voltage support(optional)
1DIMM 2DIMMs
.
9-9-9-24
9
9
-
1.5V
1.5V
1.5V
1.5V
-
7-7-7-20
8-8-8-24
8-8-8-24
-
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
DDR3 1066 MHz capability
Vendors
Part No.
Size
SS/DS Chip Brand
Chip NO.
Timing
Voltage
Crucial
CT12864BA1067.8FF
1GB
SS
Micron
9GF22D9KPT
7
ELPIDA
EBJ21UE8EDF0-AE-F
2GB
DS
ELPIDA
J1108EDSE-DJ-F
-
KINGSTON KVR1066D3N7/1G(low profile) 1GB
KINGSTON KVR1066D3N7/4G
4GB
SS
DS
ELPIDA
Hynix
J1108BFSE-DJ-F
H5TQ2G83AFR
7
7
1.35V(low
voltage)
1.5V
1.5V
DIMM socket support
(Optional)
1 DIMM
2 DIMMs
•
•
•
•
•
•
•
•
Side(s): SS - Single-sided DS - Double-sided
DIMM support:
•
1 DIMM: S
upports one module inserted into any slot as Single-channel memory
configuration.
•
2 DIMMs: Supports two modules inserted into both the blue slots as one pair of Dualchannel memory configuration.
Visit the ASUS website at www.asus.com for the latest QVL.
1-16
Chapter 1: Product introduction
1.5.3
Installing a DIMM
1
2
3
To remove a DIMM
B
A
A
ASUS A55M-A Series
1-17
1.6
Expansion slots
In the future, you may need to install expansion cards. The following sub‑sections describe
the slots and the expansion cards that they support.
Unplug the power cord before adding or removing expansion cards. Failure to do so may
cause you physical injury and damage motherboard components.
1.6.1
Installing an expansion card
To install an expansion card:
1.
Before installing the expansion card, read the documentation that came with it and
make the necessary hardware settings for the card.
2.
Remove the system unit cover (if your motherboard is already installed in a chassis).
3.
Remove the bracket opposite the slot that you intend to use. Keep the screw for later
use.
4.
Align the card connector with the slot and press firmly until the card is completely
seated on the slot.
5.
Secure the card to the chassis with the screw you removed earlier.
6.
Replace the system cover.
1.6.2
Configuring an expansion card
After installing the expansion card, configure it by adjusting the software settings.
1.
Turn on the system and change the necessary BIOS settings, if any. See Chapter 2 for
information on BIOS setup.
2.
Assign an IRQ to the card.
3.
Install the software drivers for the expansion card.
When using PCI cards on shared slots, ensure that the drivers support “Share IRQ” or that
the cards do not need IRQ assignments. Otherwise, conflicts will arise between the two PCI
groups, making the system unstable and the card inoperable.
1.6.3
PCI slot
1.6.4
PCI Express x1 slot
1.6.5
PCI Express x16 slot
The PCI slot supports cards such as a LAN card, SCSI card, USB card, and other cards that
comply with PCI specifications.
This motherboard supports PCI Express x1 network cards, SCSI cards, and other cards that
comply with the PCI Express specifications.
This motherboard supports one PCI Express x16 graphics card that complies with the PCI
Express specifications.
1-18
Chapter 1: Product introduction
IRQ assignments for this motherboard
A
B
C
D
E
F
G
H
PCIEx16_1
–
–
shared
–
–
–
–
–
PCIEx1_1
shared
–
–
–
–
–
–
–
PCI1 slot
–
–
–
–
shared
–
–
–
HD audio
shared
–
–
–
–
–
–
–
Realtek LAN controller
–
shared
SATA controller
–
–
–
shared
–
–
–
–
On Chip USB EHCI 1/2/3
–
shared
–
–
–
–
–
–
ASM1042 USB3.0 controller
–
–
shared
–
–
–
–
–
On Chip USB EHCI 1/2/3/4
ASUS A55M-A Series
–
shared
–
-
–
–
–
1-19
1.7
1.
Jumpers
Clear RTC RAM (CLRTC)
This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can
clear the CMOS memory of date, time, and system setup parameters by erasing
the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in
CMOS, which include system setup information such as system passwords.
CLRTC
A55M-A/USB3
1
2
2
Normal
(Default)
Clear RTC
3
A55M-A/USB3 Clear RTC RAM
To erase the RTC RAM:
1.
Turn OFF the computer and unplug the power cord.
2.
Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3
for about 5~10 seconds, then move the cap back to pins 1-2.
3.
Plug the power cord and turn ON the computer.
4.
Hold down the <Del> key during the boot process and enter BIOS setup to
reenter data.
Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default
position. Removing the cap will cause system boot failure!
1-20
•
If the steps above do not help, remove the onboard battery and move the jumper
again to clear the CMOS RTC RAM data. After clearing the CMOS, reinstall the
battery.
•
You do not need to clear the RTC when the system hangs due to overclocking. For
system failure due to overclocking, use the CPU Parameter Recall (C.P.R) feature.
Shut down and reboot the system so the BIOS can automatically reset parameter
settings to default values.
Chapter 1: Product introduction
2.
USB device wake-up (3-pin USBPFW)
Set these jumpers to +5V to wake up the computer from S1 sleep mode (CPU stopped,
DRAM refreshed, system running in low power mode) using the connected USB
devices. Set to +5VSB to wake up from S3 and S4 sleep modes (no power to CPU,
DRAM in slow refresh, power supply in reduced power mode).
USBPWF
A55M-A/USB3
1
2 3
2
+5V
(Default)
+5VSB
A55M-A/USB3 USB device wake up
2.
•
The USB device wake-up feature requires a power supply that can provide 500mA on
the +5VSB lead for each USB port; otherwise, the system would not power up.
•
The total current consumed must NOT exceed the power supply capability (+5VSB)
whether under normal condition or in sleep mode.
Keyboard power (3-pin KB_USBPWB)
This jumper allows you to enable or disable the keyboard wake-up feature. When you
set this jumper to pins 2-3 (+5VSB), you can wake up the computer by pressing a key
on the keyboard. This feature requires an ATX power supply that can supply at least 1A
on the +5VSB lead, and a corresponding setting in the BIOS.
A55M-A/USB3
2
1
2
3
KB_USBPWB
+5V
+5VSB
(Default)
A55M-A/USB3 Keyboard and USB device wake up
ASUS A55M-A Series
1-21
1.8
Connectors
1.8.1
1
1.
Rear panel ports
11
10
2
9
3
8
PS/2 Mouse port (green). This port is for a PS/2 mouse.
4 5
7
6
2.
Video Graphics Adapter (VGA) port. This 15-pin port is for a VGA monitor or other
VGA-compatible devices.
3.
LAN (RJ-45) port. This port allows Gigabit connection to a Local Area Network (LAN)
through a network hub.
LAN port LED indications
4.
Line In port (light blue). This port connects to the tape, CD, DVD player, or other
audio sources.
5.
Line Out port (lime). This port connects to a headphone or a speaker. In the 4, 6, and
8-channel configurations, the function of this port becomes Front Speaker Out.
6.
Microphone port (pink). This port connects to a microphone.
Activity/Link LED
Status
Description
OFF
No link
ORANGE
Linked
BLINKING
Data activity
Speed LED
Status
Description
OFF
10Mbps connection
ORANGE 100Mbps connection
GREEN
1Gbps connection
ACT/LINK SPEED
LED
LED
LAN port
Refer to the audio configuration table below for the function of the audio ports in 2, 4, 6, or
8-channel configuration.
Audio 2, 4, 6, or 8-channel configuration
Headset
4-channel
6-channel
2-channel
Light Blue (Rear panel)
Line In
Rear Speaker Out Rear Speaker Out
Lime (Rear panel)
Line Out Front Speaker Out Front Speaker Out
Pink (Rear panel)
Mic In
Mic In
Bass/Center
Lime (Front panel)
—
—
—
Port
8-channel
Rear Speaker Out
Front Speaker Out
Bass/Center
Side Speaker Out
To configure an 8-channel audio output:
1-22
Use a chassis with HD audio module in the front panel to support an 8-channel audio
output.
Chapter 1: Product introduction
7.
USB 2.0 ports 1 and 2. These two 4-pin Universal Serial Bus (USB) ports are for USB
2.0/1.1 devices.
8.
USB 3.0 ports 11 and 12 (A55M-A/USB3 only). These two 4-pin Universal Serial Bus
(USB) ports are for connecting USB 3.0 devices.
USB 2.0 ports 11 and 12 (A55M-A only). These two 4-pin Universal Serial Bus (USB)
ports are for USB 2.0/1.1 devices.
9.
DVI-D port. This port is for any DVI-D compatible device. DVI-D can’t be converted to
output RGB signal to CRT and isn’t compatible with DVI-I
10. HDMI port. This port is for a High-Definition Multimedia Interface (HDMI) connector,
and is HDCP compliant allowing playback of HD DVD, Blu-ray, and other protected
content.
11.
PS/2 Keyboard port (purple). This port is for a PS/2 keyboard.
1.8.2
1.
Internal connectors
CPU and chassis fan connectors (4-pin CPU_FAN, and 3-pin CHA_FAN)
Connect the fan cables to the fan connectors on the motherboard, ensuring that the
black wire of each cable matches the ground pin of the connector.
A55M-A/USB3
Rotation
+12V
GND
CPU FAN PWM
CPU FAN IN
CPU FAN PWR
GND
CPU_FAN CHA_FAN
A55M-A/USB3 CPU fan connector
DO NOT forget to connect the fan cables to the fan connectors. Insufficient air flow inside
the system may damage the motherboard components. These are not jumpers! DO NOT
place jumper caps on the fan connectors.
•
The CPU_FAN connector supports a CPU fan of maximum 2A (24 W) fan power.
•
Only the CPU_FAN connector support the ASUS Fan Xpert feature.
ASUS A55M-A Series
1-23
2.
ATX power connectors (24-pin EATXPWR, 4-pin ATX12V)
These connectors are for an ATX power supply. The plugs from the power supply are
designed to fit these connectors in only one orientation. Find the proper orientation and
push down firmly until the connectors completely fit.
A55M-A/USB3
GND
GND
+12V DC
+12V DC
ATX12V
EATXPWR
+3 Volts
+12 Volts
+12 Volts
+5V Standby
Power OK
PIN 1
GND
+5 Volts
GND
+5 Volts
GND
+3 Volts
+3 Volts
GND
+5 Volts
+5 Volts
+5 Volts
-5 Volts
GND
GND
GND
PSON#
GND
-12 Volts
+3 Volts
PIN 1
A55M-A/USB3 ATX power connectors
1-24
•
We recommend that you use an ATX 12V Specification 2.0‑compliant power supply
unit (PSU) with a minimum of 300W power rating. This PSU type has 24-pin and 4-pin
power plugs.
•
If you intend to use a PSU with 20-pin and 4-pin power plugs, ensure that the 20-pin
power plug can provide at least 15 A on +12 V and that the PSU has a minimum
power rating of 300W. The system may become unstable or may not boot up if the
power is inadequate.
•
DO NOT forget to connect the 4-pin ATX +12V power plug. Otherwise, the system will
not boot up.
•
We recommend that you use a PSU with higher power output when configuring a
system with more power-consuming devices or when you intend to install additional
devices. The system may become unstable or may not boot up if the power is
inadequate.
•
If you are uncertain about the minimum power supply requirement for your system,
refer to the Recommended Power Supply Wattage Calculator at http://support.asus.
com/PowerSupplyCalculator/PSCalculator.aspx?SLanguage=en-us for details.
Chapter 1: Product introduction
3.
Serial ATA 3.0 Gb/s connectors (7-pin SATA3G 1~6)
These connectors are for the Serial ATA 3.0 Gb/s signal cables for Serial ATA hard
disk drives and optical disc drives. If you installed Serial ATA hard disk drives, you can
create a RAID 0, RAID 1, or RAID 10 configuration through the onboard controller.
GND
RSATA_TXP6
RSATA_TXN6
GND
RSATA_RXN6
RSATA_RXP6
GND
GND
RSATA_RXP4
RSATA_RXN4
GND
RSATA_TXN4
RSATA_TXP4
GND
SATA3G_1
SATA3G_2
GND
RSATA_RXP2
RSATA_RXN2
GND
RSATA_TXN2
RSATA_TXP2
GND
SATA3G_4
GND
RSATA_RXP3
RSATA_RXN3
GND
RSATA_TXN3
RSATA_TXP3
GND
SATA3G_3
GND
RSATA_RXP1
RSATA_RXN1
GND
RSATA_TXN1
RSATA_TXP1
GND
A55M-A/USB3
SATA3G_6
GND
RSATA_TXP5
RSATA_TXN5
GND
RSATA_RXN5
RSATA_RXP5
GND
SATA3G_5
A55M-A/USB3 SATA 3.0Gb/s connectors
•
These connectors are set to AHCI mode by default. If you intend to create a Serial ATA
RAID set using these connectors, set the type of the SATA connectors in the BIOS to
[RAID]. See section 2.5.2 SATA Configuration for details.
•
You must install Windows® XP Service Pack 3 or later version before using Serial
ATA hard disk drives. The Serial ATA RAID feature is available only if you are using
Windows® XP SP3 or later version.
•
When using hot-plug and NCQ, set the type of the SATA connectors in the BIOS to
[AHCI]. See section 2.5.2 SATA Configuration for details.
ASUS A55M-A Series
1-25
4.
System panel connector (10-1 pin F_PANEL)
This connector supports several chassis-mounted functions.
F_PANEL
PLED+
PLEDPWR
GND
PWR LED PWR BTN
HD_LED+
HD_LEDGround
HWRST#
(NC)
PIN 1
A55M-A/USB3
+HD_LED
RESET
A55M-A/USB3 System panel connector
•
•
•
•
5.
System power LED (2-pin PLED)
This 2-pin connector is for the system power LED. Connect the chassis power LED
cable to this connector. The system power LED lights up when you turn on the system
power, and blinks when the system is in sleep mode.
Hard disk drive activity LED (2-pin +IDELED)
This 2-pin connector is for the HDD Activity LED. Connect the HDD Activity LED cable
to this connector. The IDE LED lights up or flashes when data is read from or written to
the HDD.
ATX power button/soft-off button (2-pin PWRBTN)
This 2-pin connector is for the system power button.
Reset button (2-pin RESET)
This 2-pin connector is for the chassis-mounted reset button for system reboot without
turning off the system power.
Speaker connector (4-pin SPEAKER)
The 4-pin connector is for the chassis-mounted system warning speaker. The speaker
allows you to hear system beeps and warnings.
+5V
GND
GND
Speaker Out
SPEAKER
A55M-A/USB3
PIN 1
A55M-A/USB3 Speaker Out Connector
1-26
Chapter 1: Product introduction
Digital audio connector (4-1 pin SPDIF_OUT)
A55M-A/USB3
SPDIFOUT
GND
This connector is for an additional Sony/Philips Digital Interface (S/PDIF) port.
+5V
6.
SPDIF_OUT
A55M-A/USB3 Digital audio connector
The S/PDIF module is purchased separately.
Front panel audio connector (10-1 pin AAFP)
NC
AGND
NC
NC
SENSE2_RETUR
This connector is for a chassis-mounted front panel audio I/O module that supports
either High Definition Audio or AC`97 audio standard. Connect one end of the front
panel audio I/O module cable to this connector.
AGND
NC
SENSE1_RETUR
7.
AAFP
HD-audio-compliant
pin definition
PIN 1
MIC2
MICPWR
Line out_R
NC
Line out_L
A55M-A/USB3
PORT1 L
PORT1 R
PORT2 R
SENSE_SEND
PORT2 L
PIN 1
Legacy AC’97
compliant definition
A55M-A/USB3 Front panel audio connector
•
We recommend that you connect a high-definition front panel audio module to this
connector to avail of the motherboard high-definition audio capability.
•
If you want to connect a high definition front panel audio module to this connector, set
the Front Panel Type item in the BIOS to [HD]. See section 2.5.5 Onboard Devices
Configuration for details.
•
The front panel audio I/O module is purchased separately.
ASUS A55M-A Series
1-27
8.
USB 2.0 connectors (10-1 pin USB56, USB34)
These connectors are for USB 2.0 ports. Connect the USB module cable to any of
these connectors, then install the module to a slot opening at the back of the system
chassis. These USB connectors comply with USB 2.0 specification that supports up to
480Mbps connection speed.
USB34
USB+5V
USB_P4USB_P4+
GND
NC
USB+5V
USB_P6USB_P6+
GND
NC
USB56
PIN 1
USB+5V
USB_P3USB_P3+
GND
PIN 1
USB+5V
USB_P5USB_P5+
GND
A55M-A/USB3
A55M-A/USB3 USB2.0 connectors
Never connect a 1394 cable to the USB connectors. Doing so will damage the
motherboard!
The USB 2.0 module is purchased separately.
1-28
Chapter 1: Product introduction
1.9
Software support
1.9.1
Installing an operating system
This motherboard supports Windows® XP / Vista / Windows® 7 / Windows® 8 Operating
Systems (OS). Always install the latest OS version and corresponding updates to maximize
the features of your hardware.
1.9.2
•
Motherboard settings and hardware options vary. Refer to your OS documentation for
detailed information.
•
Ensure that you install Windows® XP Service Pack 3 or later versions / Windows®
Vista Service Pack 1 or later versions before installing the drivers for better
compatibility and system stability.
•
BIOS and drivers updates are required to support Windows® 8.
Support DVD information
The Support DVD that comes with the motherboard package contains the drivers, software
applications, and utilities that you can install to avail all motherboard features.
The contents of the Support DVD are subject to change at any time without notice. Visit the
ASUS website at www.asus.com for updates.
To run the Support DVD
Place the Support DVD into the optical drive. If Autorun is enabled in your computer, the DVD
automatically displays the Specials screen. Click Drivers, Utilities, Make Disk, Manual, and
Contact tabs to display their respective menus.
The following screen is for reference only.
Click an icon to
display Support
DVD/motherboard
information
Click an item to install
If Autorun is NOT enabled on your computer, browse the contents of the Support DVD to
locate the file ASSETUP.EXE from the BIN folder. Double-click the ASSETUP.EXE to run
the DVD.
ASUS A55M-A Series
1-29
1-30
Chapter 1: Product introduction
BIOS information
2.1
Managing and updating your BIOS
2
Save a copy of the original motherboard BIOS file to a USB flash disk in case you need to
restore the BIOS in the future. Copy the original motherboard BIOS using the ASUS Update
utility.
2.1.1
ASUS Update utility
The ASUS Update is a utility that allows you to manage, save, and update the motherboard
BIOS in Windows® environment.
•
ASUS Update requires an Internet connection either through a network or an Internet
Service Provider (ISP).
•
This utility is available in the support DVD that comes with the motherboard package.
Installing ASUS Update
To install ASUS Update:
1.
Place the support DVD in the optical drive. The Specials menu appears.
2.
Click the Utilities tab, then click AI Suite II.
3.
Follow the onscreen instructions to complete the installation.
Quit all Windows® applications before you update the BIOS using this utility.
Updating the BIOS
To update the BIOS:
1.
From the Windows® desktop, click Start > Programs > ASUS > AI Suite II > AI Suite
II X.XX.XX to launch the AI Suite II utility. The AI Suite II Quick Bar appears.
2.
Click Update button from the Quick Bar, and then click ASUS Update from the popup
menu. The ASUS Update main screen appears. From the list, select either of the
following methods:
Chapter 2: BIOS information
2-1
Updating from the Internet
a.
Select Update BIOS from the Internet, then click Next.
b.
Select the ASUS FTP site nearest you to avoid network traffic, then click Next.
c.
From the FTP site, select the BIOS version that you wish to download then click Next.
The ASUS Update utility is capable of updating itself through the Internet. Always update
the utility to avail all its features.
Updating from a BIOS file
a.
Select Update BIOS from file, then click Next.
b.
Locate the BIOS file from the Open window, then click Open.
3.
Follow the onscreen instructions to complete the updating process.
2.1.2
ASUS EZ Flash 2
The ASUS EZ Flash 2 feature allows you to update the BIOS without using an OS‑based
utility.
Before you start using this utility, download the latest BIOS file from the ASUS website at
www.asus.com.
To update the BIOS using EZ Flash 2:
2-2
1.
Insert the USB flash disk that contains the latest BIOS file to the USB port.
2.
Enter the Advanced Mode of the BIOS setup program. Go to the Tool menu to select
ASUS EZ Flash 2 Utility and press <Enter> to enable it.
3.
Press <Tab> to switch to the Drive field.
4.
Press the Up/Down arrow keys to find the USB flash disk that contains the latest BIOS,
and then press <Enter>.
5.
Press <Tab> to switch to the Folder Info field.
6.
Press the Up/Down arrow keys to find the BIOS file, and then press <Enter> to perform
the BIOS update process. Reboot the system when the update process is done.
•
This function supports USB flash disks formatted using FAT 32/16 on a single partition.
•
DO NOT shut down or reset the system while updating the BIOS to prevent system
boot failure!
ASUS A55M-A Series
2.1.3
ASUS CrashFree BIOS 3 utility
The ASUS CrashFree BIOS 3 is an auto recovery tool that allows you to restore the BIOS file
when it fails or gets corrupted during the updating process. You can restore a corrupted BIOS
file using the motherboard support DVD or a USB flash drive that contains the updated BIOS
file.
•
Before using this utility, rename the BIOS file in the removable device into
A55MA.CAP (for A55M-A) or A55MAUSB3.CAP (for A55M-A USB3).
•
The BIOS file in the support DVD may not be the latest version. Download the latest
BIOS file from the ASUS website at www.asus.com.
Recovering the BIOS
To recover the BIOS:
1.
Turn on the system.
2.
Insert the support DVD to the optical drive or the USB flash drive that contains the
BIOS file to the USB port.
3.
The utility automatically checks the devices for the BIOS file. When found, the utility
reads the BIOS file and enters ASUS EZ Flash 2 utility automatically.
4.
The system requires you to enter BIOS Setup to recover BIOS setting. To ensure
system compatibility and stability, we recommend that you press <F5> to load default
BIOS values.
DO NOT shut down or reset the system while updating the BIOS! Doing so can cause
system boot failure!
Chapter 2: BIOS information
2-3
2.1.4
ASUS BIOS Updater
The ASUS BIOS Updater allows you to update BIOS in DOS environment. This utility also
allows you to copy the current BIOS file that you can use as a backup when the BIOS fails or
gets corrupted during the updating process.
The succeeding utility screens are for reference only. The actual utility screen displays may
not be same as shown.
Before updating BIOS
1.
Prepare the motherboard support DVD and a USB flash drive formatted using
FAT32/16 on a single partition.
2.
Download the latest BIOS file and BIOS Updater from the ASUS website at
http://support.asus.com and save them on the USB flash drive.
NTFS is not supported under DOS environment. Do not save the BIOS file and BIOS
Updater to a hard disk drive or USB flash drive in NTFS format.
3.
Turn off the computer and disconnect all SATA hard disk drives (optional).
Booting the system in DOS environment
1.
Insert the USB flash drive with the latest BIOS file and BIOS Updater to the USB port.
2.
Boot your computer. When the ASUS Logo appears, press <F8> to show the BIOS
Boot Device Select Menu. Insert the support DVD into the optical drive and select the
optical drive as the boot device.
Please select boot device:
SATA: XXXXXXXXXXXXXXXX
USB XXXXXXXXXXXXXXXXX
UEFI: XXXXXXXXXXXXXXXX
Enter Setup
↑ and ↓ to move selection
ENTER to select boot device
ESC to boot using defaults
3. When the Make Disk menu appears, select the FreeDOS command prompt item by
pressing the item number.
4.
At the FreeDOS prompt, type d: and press <Enter> to switch the disk from Drive C
(optical drive) to Drive D (USB flash drive).
Welcome to FreeDOS (http://www.freedos.org)!
C:\>d:
D:\>
2-4
ASUS A55M-A Series
Updating the BIOS file
To update the BIOS file using BIOS Updater
1.
At the FreeDOS prompt, type bupdater /pc /g and press <Enter>.
D:\>bupdater /pc /g
2.
The BIOS Updater screen appears as below.
ASUSTek BIOS Updater for DOS V1.30
Current ROM
BOARD: A55M-A/USB3
VER: 0202
DATE: 01/13/2013
Update ROM
BOARD: Unknown
VER: Unknown
DATE: Unknown
PATH: A:\
A55M-A-USB3.CAP 8390656 2012-07-13 17:30:48
A:
Note
3.
[Enter] Select or Load
[Tab] Switch
[V] Drive Info
[Up/Down/Home/End] Move
[B] Backup
[Esc] Exit
Press <Tab> to switch between screen fields and use the <Up/Down/Home/End> keys
to select the BIOS file and press <Enter>. BIOS Updater checks the selected BIOS file
and prompts you to confirm BIOS update.
Are you sure to update BIOS?
Yes
4.
No
Select Yes and press <Enter>. When BIOS update is done, press <ESC> to exit BIOS
Updater. Restart your computer.
DO NOT shut down or reset the system while updating the BIOS to prevent system boot
failure!
•
For BIOS Updater version 1.30 or later, the utility automatically exits to the DOS
prompt after updating BIOS.
•
Ensure to load the BIOS default settings to ensure system compatibility and stability.
Select the Load Optimized Defaults item under the Exit menu. Refer to section 2.9
Exit menu for details.
•
Ensure to connect all SATA hard disk drives after updating the BIOS file if you have
disconnected them.
Chapter 2: BIOS information
2-5
2.2
BIOS setup program
Use the BIOS Setup program to update the BIOS or configure its parameters. The BIOS
screens include navigation keys and brief online help to guide you in using the BIOS Setup
program.
Entering BIOS Setup at startup
To enter BIOS Setup at startup:
•
Press <Delete> during the Power-On Self Test (POST). If you do not press <Delete>,
POST continues with its routines.
Entering BIOS Setup after POST
To enter BIOS Setup after POST:
•
Press <Ctrl>+<Alt>+<Del> simultaneously.
•
Press the power button to turn the system off then back on. Do this option only if you
failed to enter BIOS Setup using the first two options.
•
Press the reset button on the system chassis.
Using the power button, reset button, or the <Ctrl>+<Alt>+<Del> keys to force
reset from a running operating system can cause damage to your data or system. We
recommend to always shut down the system properly from the operating system.
•
The BIOS setup screens shown in this section are for reference purposes only, and
may not exactly match what you see on your screen.
•
Ensure that a USB mouse is connected to your motherboard if you want to use the
mouse to control the BIOS setup program.
•
The default BIOS settings for this motherboard apply for most conditions to ensure
optimum performance. If the system becomes unstable after changing any BIOS
settings, load the default settings to ensure system compatibility and stability. Select
the Load Optimized Defaults item under the Exit Menu. See section 2.9 Exit Menu.
•
If the system fails to boot after changing any BIOS setting, try to clear the CMOS and
reset the motherboard to the default value. Refer to section 1.7 Jumpers on how to
erase the RTC RAM.
•
The BIOS setup program does not support the bluetooth devices.
BIOS menu screen
The BIOS setup program can be used under two modes: EZ Mode and Advanced Mode.
You can change modes from the Exit menu or from the Exit/Advanced Mode button in the
EZ Mode/Advanced Mode screen.
2-6
ASUS A55M-A Series
EZ Mode
By default, the EZ Mode screen appears when you enter the BIOS setup program. The EZ
Mode provides you an overview of the basic system information, and allows you to select
the display language, system performance mode and boot device priority. To access the
Advanced Mode, click Exit/Advanced Mode, then select Advanced Mode or press F7 hot
key for the advanced BIOS settings.
The default screen for entering the BIOS setup program can be changed. Refer to the
Setup Mode item in section 2.7 Boot menu for details.
Selects the display language of
the BIOS setup program
Displays the CPU/motherboard temperature,
CPU/5V/3.3V/12V voltage output,
CPU/chassis fan speed
Selects the Advanced
mode functions
Selects the boot
device priority
Silent mode
Exits the BIOS setup program without saving
the changes, saves the changes and resets
the system, or enters the Advanced Mode
Standard mode
Loads optimized default
Turbo mode
Selects the boot device priority
Displays the system properties of the
selected mode on the right hand side
Displays the Advanced mode menus
•
The boot device options vary depending on the devices you installed to the system.
•
The Boot Menu(F8) button is available only when the boot device is installed to the
system.
Chapter 2: BIOS information
2-7
Advanced Mode
The Advanced Mode provides advanced options for experienced end-users to configure
the BIOS settings. The figure below shows an example of the Advanced Mode. Refer to the
following sections for the detailed configurations.
To access the EZ Mode, click Exit, then select ASUS EZ Mode.
Back button
Menu items
Menu bar
Configuration fields
Pop-up window
Scroll bar
General help
Navigation keys
Menu bar
The menu bar on top of the screen has the following main items:
Main
Ai Tweaker
For changing the overclocking settings
Advanced
For changing the advanced system settings
Monitor
For displaying the system temperature, power status, and changing the fan settings
Boot
For changing the system boot configuration
Tool
For configuring options for special functions
Exit
2-8
For changing the basic system configuration
For selecting the exit options and loading default settings
ASUS A55M-A Series
Menu items
The highlighted item on the menu bar displays the specific items for that menu. For example,
selecting Main shows the Main menu items.
The other items (Ai Tweaker, Advanced, Monitor, Boot, Tool, and Exit) on the menu bar have
their respective menu items.
Back button
This button appears when entering a submenu. Press <Esc> or use the USB mouse to click
this button to return to the previous menu screen.
Submenu items
A greater than sign (>) before each item on any menu screen means that the item has a
submenu. To display the submenu, select the item and press <Enter> or double-click the
item.
Pop-up window
Select a menu item and press <Enter> to display a pop-up window with the configuration
options for that item.
Scroll bar
A scroll bar appears on the right side of a menu screen when there are items that do not fit on
the screen. Press the Up/Down arrow keys or <Page Up> / <Page Down> keys to display the
other items on the screen.
Navigation keys
At the bottom right corner of the menu screen are the navigation keys for the BIOS setup
program. Use the navigation keys to select items in the menu and change the settings.
General help
At the top right corner of the menu screen is a brief description of the selected item.
Configuration fields
These fields show the values for the menu items. If an item is user-configurable, you can
change the value of the field opposite the item. You cannot select an item that is not userconfigurable.
A configurable field is highlighted when selected. To change the value of a field, select it and
press <Enter> or click on it to display a list of options.
Chapter 2: BIOS information
2-9
2.3
Main menu
2.3.1
System Language [English]
2.3.2
System Date [Day xx/xx/xxxx]
2.3.3
System Time [xx:xx:xx]
2.3.4
Security
The Main menu screen appears when you enter the Advanced Mode of the BIOS Setup
program. The Main menu provides you an overview of the basic system information, and
allows you to set the system date, time, language, and security settings.
Allows you to choose the BIOS language version from the options. Configuration options:
[English] [Français] [Español] [Deutsch] [Русский]
Allows you to set the system date.
Allows you to set the system time.
The Security menu items allow you to change the system security settings.
2-10
•
If you have forgotten your BIOS password, erase the CMOS Real Time Clock (RTC)
RAM to clear the BIOS password. See section 1.7 Jumpers for information on how to
erase the RTC RAM.
•
The Administrator or User Password items on top of the screen show the default
Not Installed. After you set a password, these items show Installed.
ASUS A55M-A Series
Administrator Password
If you have set an administrator password, we recommend that you enter the administrator
password for accessing the system. Otherwise, you might be able to see or change only
selected fields in the BIOS setup program.
To set an administrator password:
1.
Select the Administrator Password item and press <Enter>.
2.
From the Create New Password box, key in a password, then press <Enter>.
3.
Confirm the password when prompted.
To change an administrator password:
1.
Select the Administrator Password item and press <Enter>.
2.
From the Enter Current Password box, key in the current password, then press
<Enter>.
3.
From the Create New Password box, key in a new password, then press <Enter>.
4.
Confirm the password when prompted.
To clear the administrator password, follow the same steps as in changing an administrator
password, but press <Enter> when prompted to create/confirm the password. After you clear
the password, the Administrator Password item on top of the screen shows Not Installed.
User Password
If you have set a user password, you must enter the user password for accessing the system.
The User Password item on top of the screen shows the default Not Installed. After you set
a password, this item shows Installed.
To set a user password:
1.
Select the User Password item and press <Enter>.
2.
From the Create New Password box, key in a password, then press <Enter>.
3.
Confirm the password when prompted.
To change a user password:
1.
Select the User Password item and press <Enter>.
2.
From the Enter Current Password box, key in the current password, then press
<Enter>.
3.
From the Create New Password box, key in a new password, then press <Enter>.
4.
Confirm the password when prompted.
To clear the user password, follow the same steps as in changing a user password, but press
<Enter> when prompted to create/confirm the password. After you clear the password, the
User Password item on top of the screen shows Not Installed.
Chapter 2: BIOS information
2-11
2.4
Ai Tweaker menu
The Ai Tweaker menu items allow you to configure overclocking-related items.
Be cautious when changing the settings of the Ai Tweaker menu items. Incorrect field
values can cause the system to malfunction.
The configuration options for this section vary depending on the CPU and DIMM model you
installed on the motherboard.
Scroll down to display the following items:
2-12
ASUS A55M-A Series
Target CPU Speed : xxxxMHz
Displays the current CPU speed.
Target DRAM Speed : xxxxMHz
Displays the current DRAM speed.
2.4.1
Ai Overclock Tuner [Auto]
Allows you to select the CPU overclocking options to achieve the desired CPU internal
frequency. Select any of these preset overclocking configuration options:
[Auto]Loads the optimal settings for the system.
[Manual]
Allows you to individually set overclocking parameters.
APU Frequency [XXX]
This item appears only when you set the Ai Overclock Tuner item to [Manual]. Use the <+>
and <-> keys to adjust the value. You can also key in the desired value using the numeric
keypad. The values range from 90.0MHz to 300.0MHz.
2.4.2
Memory Frequency [Auto]
Allows you to set the memory operating frequency. Configuration options: [Auto] [DDR3800MHz] [DDR3-1066MHz] [DDR3-1333MHz] [DDR3-1600MHz] [DDR3-1866MHz]
Selecting a very high memory frequency may cause the system to become unstable! If this
happens, revert to the default setting.
2.4.3
APU Multiplier [Auto]
2.4.4
NB Frequency [Auto]
2.4.5
EPU Power Saving Mode [Disabled]
Allows you to set the multiplier between the CPU Core Clock and the FSB Frequency. Use
the <+> and <-> keys to adjust the ratio. The valid value ranges vary according to your CPU
model.
Allows you to adjust the NB frequency. Use the <+> and <-> keys to adjust the value. You
can also key in the desired value using the numeric keypad.
Allows you to enable or disable the EPU power saving function. Configuration options:
[Disabled] [Enabled]
EPU Setting [Auto]
This item appears only when The EPU Power Saving Mode is set to [Enabled] and
allows you to set power saving mode. Configuration options: [Auto] [Light Power
Saving Mode] [Medium Power Saving Mode] [Max Power Saving Mode]
Chapter 2: BIOS information
2-13
2.4.6
DRAM Timing Control
The sub-items in this menu allow you to set the DRAM timing control features. Use the <+>
and <-> keys to adjust the value. To restore the default setting, type [auto] using the keyboard
and press <Enter>.
Changing the values in this menu may cause the system to become unstable! If this
happens, revert to the default settings.
2.4.7
APU Voltage [Offset Mode]
[Offset Mode]
To offset the voltage by a positive or negative value.
CPU Offset Mode Sign [+]
[+]
[–]
To offset the voltage by a positive value.
To offset the voltage by a negative value.
CPU Offset Voltage [Auto]
Allows you to set the CPU Offset voltage. The values range from 0.00625V to 0.500V with a
0.00625V interval.
Refer to the CPU documentation before setting the CPU voltage. Setting a high voltage
may damage the CPU permanently, and setting a low voltage may make the system
unstable.
VDDNB Offset Mode Sign [+]
[+]
[–]
To offset the voltage by a positive value.
To offset the voltage by a negative value.
VDDNB Offset Voltage [Auto]
Allows you to set the VDDNB Offset voltage. The values range from 0.00625V to 0.500V with
a 0.00625V interval.
2.4.8
DRAM Voltage [Auto]
2.4.9
SB 1.1V Voltage [Auto]
Allows you to set the DRAM voltage. The values range from 1.35V to 1.65V with a 0.15V
interval.
Allows you to set the Southbridge 1.1V voltage. The values range from 1.1V to 1.22V with a
0.04V interval.
2-14
•
The values of the CPU Offset Voltage, VDDNB Offset Voltage, DRAM Voltage, and
SB 1.1V Voltage items are labeled in a different color, indicating the risk levels of high
voltage settings.
•
The system may need a better cooling system to work properly under high voltage
settings.
ASUS A55M-A Series
2.4.10
DIGI+ VRM
CPU Load Line Calibration [Auto]
Load-line Calibration is defined by AMD VRM specifications and affects CPU voltage. The
CPU working voltage will decrease proportionally to CPU loading. Higher load-line calibration
would get higher voltage and better overclocking performance, but increase the CPU and
VRM thermal. This item allows you to adjust the voltage range from the following percentages
to boost the system performance. Configuration options: [Auto] [Regular] [Medium] [High]
[Extreme]
The actual performance boost may vary depending on your CPU specifiation.
CPU/NB Load Line Calibration [Auto]
Allows you to select the CPU/NB Load-Line Calibration mode. Configuration options: [Auto]
[Regular] [High] [Extreme]
CPU Current Capability [100%]
This item provides wider total power range for overclocking. A higher value brings a
wider total power range and extends the overclocking frequency range simultaneously.
Configuration options: [100%] [110%] [120%] [130%]
CPU/NB Current Capability [100%]
This item provides wider total power range for overclocking. A higher value brings a
wider total power range and extends the overclocking frequency range simultaneously.
Configuration options: [100%] [110%] [120%] [130%]
CPU Power Phase Control [Standard]
Phase number is the number of working VRM phase. Increasing phase number under heavy
system loading to get more transient and better thermal performance. Reducing phase
number under light system loading to increase VRM efficiency.
[Standard]
[Optimized]
[Extreme]
[Manual Adjustment]
Proceeds phase control depending on the CPU loading.
Loads the ASUS optimized phase tuning profile.
Proceeds the full phase mode.
Allows manual adjustment.
CPU Voltage Frequency [300]
Switching frequency will affect the VRM transient response and component thermal. Setting
a higher frequency gets faster transient response. Use the <+> and <-> keys to adjust the
value. The values range from 200k Hz to 350k Hz with a 50k Hz interval.
CPU Power Duty Control [T.Probe]
[T.Probe]
[Extreme]
Maintains the VRM thermal balance.
Maintains the VRM current balance.
Do not remove the thermal module while changing the DIGI+VRM related parameters. The
thermal conditions should be monitored.
Chapter 2: BIOS information
2-15
2.5
Advanced menu
The Advanced menu items allow you to change the settings for the CPU and other system
devices.
Be cautious when changing the settings of the Advanced menu items. Incorrect field values
can cause the system to malfunction.
2.5.1
CPU Configuration
The items in this menu show the CPU-related information that the BIOS automatically
detects.
The items shown in submenu may be different due to the CPU you installed.
AMD PowerNow function [Enabled]
Enables or disables the AMD PowerNow function. Configuration options: [Enabled] [Disabled]
NX Mode [Enabled]
Enables or disables the No-execute page protection function. Configuration options:
[Enabled] [Disabled]
SVM [Enabled]
Enables or disables CPU virtualization. Configuration options: [Disabled] [Enabled]
2-16
ASUS A55M-A Series
CPB Mode [Auto]
Disables the CPB (Core Performance Boost) mode or set it to [Auto] for automatic
configuration. Configuration options: [Disabled] [Auto]
C6 Mode [Enabled]
Enables or disables C6 mode. Configuration options: [Enabled] [Disabled]
IOMMU [Disabled]
Set this item to [Enabled] to show IOMMU Mode. Configuration options: [Enabled] [Disabled]
Bank Interleaving [Enabled]
Enables or disables Bank Interleaving. Configuration options: [Enabled] [Disabled]
Channel Interleaving [Enabled]
Enables or disables Channel Interleaving. Configuration options: [Enabled] [Disabled]
Core Leveling Mode [Automatic mode]
Adjust ratio of number of cores per processor or per compute unit Configuration options:
[Automatic mode] [One core per processor] [One Compute Unit] [One core per Compute Unit]
Chapter 2: BIOS information
2-17
2.5.2
SATA Configuration
While entering Setup, the BIOS automatically detects the presence of SATA devices. The
SATA Port items show Not Present if no SATA device is installed to the corresponding SATA
port.
OnChip SATA Channel [Enabled]
Enables or disables onboard channel SATA port. Configuration options: [Disabled] [Enabled]
OnChip SATA Type [AHCI]
Allows you to set the SATA configuration.
[IDE]Set to [IDE] when you want to use the Serial ATA hard disk drives as
Parallel ATA physical storage devices.
[RAID]
Set to [RAID] when you want to create a RAID configuration from the SATA
hard disk drives.
[AHCI]Set to [AHCI] when you want the SATA hard disk drives to use the AHCI
(Advanced Host Controller Interface). The AHCI allows the onboard storage
driver to enable advanced Serial ATA features that increases storage
performance on random workloads by allowing the drive to internally
optimize the order of commands.
S.M.A.R.T. Status Check [Enabled]
S.M.A.R.T. (Self-Monitoring, Analysis and Reporting Technology) is a monitor system. When
read/write of your hard disk errors occur, this feature allows the hard disk to report warning
messages during the POST. Configuration options: [Enabled] [Disabled]
2-18
ASUS A55M-A Series
2.5.3
USB Configuration
The items in this menu allow you to change the USB-related features.
The USB Devices item shows the auto-detected values. If no USB device is detected, the
item shows None.
USB Device Enable [Enabled]
[Enabled]
[Disabled]
Enables available USB devices.
Disables available USB devices.
Legacy USB Support [Enabled]
[Enabled]
[Disabled]
[Auto] Enables the support for USB devices on legacy operating systems (OS).
The USB devices can be used only for the BIOS setup program.
Allows the system to detect the presence of USB devices at startup. If
detected, the USB controller legacy mode is enabled. If no USB device is
detected, the legacy USB support is disabled.
Legacy USB3.0 Support [Enabled] (A55M-A/USB3 only)
[Enabled]
[Disabled]
Enables the support for USB 3.0 devices on legacy operating systems
(OS).
Disables the function.
EHCI Hand-off [Disabled]
[Enabled]
[Disabled]
Enables the support for operating systems without an EHCI hand‑off
feature.
Disables the function.
USB Single Port Control
Allows you to enable/disable individual USB ports.
2.5.4
NB Configuration
IGFX Multi-Monitor [Disabled]
Enables or disables the Internal Graphics Device Multi-Monitor support for add-on VGA
devices. And the memory size of Internal Graphics Device will keep memory reserved.
Configuration options: [Disabled] [Enabled]
Primary Video Device [PCIE / PCI Video]
Selects the primary display device. Configuration options: [IGFX Video] [PCIE / PCI Video]
Integrated Graphics [Auto]
Enables the integrated graphics controller. Configuration options: [Auto] [Force]
Chapter 2: BIOS information
2-19
2.5.5
Onboard Devices Configuration
HD Audio Device [Enabled]
[Enabled]
[Disabled]
Enables the High Definition Audio Controller.
Disables the controller.
The following two items appear only when you set the HD Audio Device item to [Enabled].
Front Panel Type [HD]
Allows you to set the front panel audio connector (AAFP) mode to legacy AC’97 or highdefinition audio depending on the audio standard that the front panel audio module supports.
[HD]
[AC97]
Sets the front panel audio connector (AAFP) mode to high definition audio.
Sets the front panel audio connector (AAFP) mode to legacy AC’97.
SPDIF Out Type [SPDIF]
[SPDIF]
[HDMI]
Sets to [SPDIF] for SPDIF audio output.
Sets to [HDMI] for HDMI audio output.
Realtek LAN Controller [Enabled]
[Enabled]
[Disabled]
Enables the Realtek LAN controller.
Disables the controller.
Realtek PXE OPROM [Disabled]
This item appears only when you set the Realtek LAN Controller item to [Enabled] and
allows you to enable or disable the Rom Help of the Realtek LAN controller. Configuration
options: [Enabled] [Disabled]
Asmedia USB 3.0 Controller [Enabled] (A55M-A/USB3 only)
[Enabled]
[Disabled]
Enables the onboard USB 3.0 controller.
Disables the controller.
Asmedia USB 3.0 Battery Charging Support [Disabled] (A55M-A/USB3 only)
This item appears only when the Asmedia USB 3.0 Controller item is set to [Enabled].
[Enabled]
[Disabled]
2-20
Enables the Asmedia USB 3.0 battery charging function.
Disables this function
ASUS A55M-A Series
2.5.6
APM
Restore AC Power Loss [Power Off]
[Power On]
[Power Off]
[Last State]
The system goes into on state after an AC power loss.
The system goes into off state after an AC power loss.
The system goes into either off or on state, whatever the system state was
before the AC power loss.
Power On By PME [Disabled]
[Disabled]
[Enabled]
Disables the PME to wake up by PCI/PCIE devices.
Allows you to turn on the system through a PCI/PCIE LAN or modem card.
This feature requires an ATX power supply that provides at least 1A on the
+5VSB lead.
Power On By RTC [Disabled]
[Disabled]
[Enabled]
Disables RTC to generate a wake event.
When set to [Enabled], the items RTC Alarm Date (Days) and Hour/
Minute/Second will become user-configurable with set values.
RTC Alarm Date (Days)
This item appears only when you set the previous item to [Enabled] and allows you to select
RTC alarm time (days). When you set the time to zero, the RTC alarms everyday. Use <+>
and <-> keys to adjust the time.
- Hour / - Minute / - Second
Allows you to set the RTC alarm time. Use <+> and <-> keys to adjust the time.
Chapter 2: BIOS information
2-21
2.5.7
Network Stack
Network Stack [Disabled]
This item allows user to disable or enable the UEFI network stack. Configuration options:
[Disabled] [Enabled]
Ipv4 PXE Support [Enabled]
This item appears only when you set the Network Stack item to [Enabled]. When this item
is disabled, the IPV4 PXE boot option will not be created. Configuration options: [Disabled]
[Enabled]
Ipv6 PXE Support [Enabled]
This item appears only when you set the Network Stack item to [Enabled]. When this item
is disabled, the IPV6 PXE boot option will not be created. Configuration options: [Disabled]
[Enabled]
2-22
ASUS A55M-A Series
2.6
Monitor menu
2.6.1
CPU Temperature / MB Temperature [xxxºC/xxxºF]
2.6.2
CPU / Chassis fan Speed [xxxx RPM] or [Ignore] /
[N/A]
The Monitor menu displays the system temperature/power status, and allows you to change
the fan settings.
The onboard hardware monitor automatically detects and displays the CPU and motherboard
temperatures. Select Ignore if you do not wish to display the detected temperatures.
The onboard hardware monitor automatically detects and displays the CPU / chassis fan
speeds in rotations per minute (RPM). If the fan is not connected to the motherboard, the field
shows N/A. Select Ignore if you do not wish to display the detected speed.
2.6.3
CPU Voltage, 3.3V Voltage, 5V Voltage, 12V Voltage
2.6.4
CPU Q-Fan Control [Enabled]
The onboard hardware monitor automatically detects the voltage output through the onboard
voltage regulators. Select Ignore if you do not want to detect this item.
[Disabled]
[Enabled]
Disables the CPU Q-Fan control feature.
Enables the CPU Q-Fan control feature.
Chapter 2: BIOS information
2-23
Fan Speed Low Limit [200 RPM]
This item appears only when you enable the CPU Q-Fan Control feature and allows
you to disable or set the CPU fan warning speed. Configuration options: [Ignore]
[200RPM] [300 RPM] [400 RPM] [500 RPM] [600 RPM]
Fan Profile [Standard]
This item appears only when you enable the CPU Q-Fan Control feature and allows
you to set the appropriate performance level of the CPU fan.
[Standard]Sets to [Standard] to make the CPU fan automatically adjust depending on
the CPU temperature.
[Silent]Sets to [Silent] to minimize the fan speed for quiet CPU fan operation.
[Turbo]
Sets to [Turbo] to achieve maximum CPU fan speed.
[Manual] Sets to [Manual] to assign detailed fan speed control parameters.
The following four items appear only when you set CPU Profile to [Manual].
CPU_FAN Upper Temperature [70ºC]
Use the <+> and <-> keys to adjust the upper limit of the CPU temperature. The values range
from 20ºC to 90ºC.
CPU_FAN Fan Max. Duty Cycle(%) [100%]
Use the <+> and <-> keys to adjust the maximum CPU fan duty cycle. The values range from
40% to 100%. When the CPU temperature reaches the upper limit, the CPU fan will operate at
the maximum duty cycle.
CPU_FAN Lower Temperature [20ºC]
Displays the lower limit of the CPU temperature.
CPU_FAN Fan Min. Duty Cycle(%) [40%]
Use the <+> and <-> keys to adjust the minimum CPU fan duty cycle. The values range from
40% to 100%. When the CPU temperature is under the lower limit, the CPU fan will operate at
the minimum duty cycle.
2.6.5
Anti Surge Support [Auto]
This item allows you to enable or disable the Anti Surge function. Configuration options:
[Auto] [Disabled] [Enabled]
2-24
ASUS A55M-A Series
2.7
Boot menu
The Boot menu items allow you to change the system boot options.
Scroll down to display the following items:
Chapter 2: BIOS information
2-25
2.7.1
Fast Boot [Enabled]
Enable or disable boot with initialization of a minimal set of devices to launch active boot
option. Configuration options: [Disabled] [Enabled]
The following three items appear only when you set Fast Boot to [Enabled].
USB Support [Partial Initialization]
[Disabled]All USB devices will not be available until OS boot up for the fastest
possible POST time.
[Full Initialization]All USB devices will be available during POST. This process will
extend POST time.
[Partial Initialization]For a faster POST time, only the USB ports with keyboard and
mouse connections will be detected.
PS/2 Keyboard and Mouse Support [Auto]
[Auto]
[Full Initialization]
[Disabled]
For a faster POST time, PS/2 devices are available when the
system boots up or rebooted as long as the PS/2 devices have not
been reconnected or changed.
For full system control, PS/2 devices are available during POST.
This setting will extend POST time.
For a shorter POST time, all PS/2 devices are available only after
the PC enters the OS.
Network Stack Driver Support [Disabled]
[Disabled]
If Disabled, the Network Stack Driver will be skipped. To enable this
feature, enable the Network Stack item in the Advanced menu.
[Enabled]
Allows the BIOS to boot from the Network Stack Driver.
Next boot after AC Power Loss [Normal Boot]
[Normal Boot]
[Fast Boot]
2.7.2
[Enabled]
Returns to normal boot on the next boot after an AC power loss.
Accelerates the boot speed on the next boot after an AC power loss.
Full Screen Logo [Enabled]
Enables the full screen logo display feature.
[Disabled]
Disables the full screen logo display feature.
Set this item to [Enabled] to use the ASUS MyLogo 2™ feature.
Post Report [5 sec]
This item appears only when the Full Screen Logo item is set to [Disabled] and allows you to
set the waiting time for the system to display the post report. Configuration options: [1 sec] [2
sec] [3 sec] [4 sec] [5 sec] [6 sec] [7 sec] [8 sec] [9 sec] [10 sec] [Until Press ESC]
2-26
ASUS A55M-A Series
2.7.3
Post Delay Time [3 sec]
2.7.4
Bootup NumLock State [On]
Allows you to set the POST Report wait time. This configuration only functions in Normal
Boot mode. Configuration options: [0 sec] [1 sec] [2 sec] [3 sec] [4 sec] [5 sec] [6 sec] [7 sec]
[8 sec] [9 sec] [10 sec]
[On]
Sets the power-on state of the NumLock to [On].
[Off]
Sets the power-on state of the NumLock to [Off].
2.7.5
Wait for ‘F1’ If Error [Enabled]
2.7.6
Option ROM Messages [Force BIOS]
2.7.7
Interrupt 19 Capture [Postponed]
When this item is set to [Enabled], the system waits for the F1 key to be pressed when error
occurs. Configuration options: [Disabled] [Enabled]
[Force BIOS]
The third-party ROM messages will be forced to display during the boot
sequence.
[Keep Current] The third-party ROM messages will be displayed only if the third-party
manufacturer had set the add-on device to do so.
[Immediate]
[Postponed]
2.7.8
Immediately capture Interrupt 19 during boot process.
Postpone capture of Interrupt 19 during boot process.
Setup Mode [EZ Mode]
[Advanced Mode]Sets Advanced Mode as the default screen for entering the BIOS setup
program.
[EZ Mode]
Sets EZ Mode as the default screen for entering the BIOS setup program.
Chapter 2: BIOS information
2-27
2.7.9
CSM Parameters
This option controls whether or not CSM (Compatibility Support Module) will be launched.
Launch CSM [Auto]
Configuration option: [Auto] [Enabled] [Disabled]
The following four items appear only when you set Launch CSM to [Enabled].
Boot Device Control [UEFI and Legacy OpROM]
Configuration option: [UEFI and Legacy OpRom] [Legacy OpROM only] [UEFI only]
Boot from Network Devices [Legacy OpROM first]
Configuration option: [Legacy OpROM first] [UEFI driver first] [Ignore]
Boot from Storage Devices [Legacy OpRom first]
Configuration option: [Both, Legacy OpROM first] [Both, UEFI driver first] [Legacy
OpROM first] [UEFI driver first] [Ignore]
Boot from PCIe/PCI Expansion Devices [Legacy OpROM first]
Configuration option: [Legacy OpROM first] [UEFI driver first]
2.7.10
Secure Boot
This option allows you to configure the Secure Boot related parameters.
OS Type [Other OS]
Configuration option: [Windows UEFI mode] [Other OS]
Secure Boot Mode [Standard]
This item appears only when you set the OS Type to [Windows UEFI]. Configuration option:
[Standard] [Custom]
The following items appear when Secure Boot Mode is set to [Custom].
Key Management
Manage the Secure Boot Keys (PK, KEK, DB, DBX)
Install default Secure Boot Keys
Configuration options: [Yes] [No]
Platform Key (PK)
Load PK from File
Configuration options: [Ok]
Copy PK to File
Configuration options: [Ok]
Delete the PK
Configuration options: [Yes] [No]
2-28
ASUS A55M-A Series
KEK Management (KEK)
Load KEK from File
Configuration options: [Ok]
Copy KEK to File
Configuration options: [Ok]
Delete the KEK
Configuration options: [Yes] [No]
Append KEK from File
Configuration options: [Ok]
DB Management
Load DB from File
Configuration options: [Ok]
Copy DB to File
Configuration options: [Ok]
Delete the DB
Configuration options: [Yes] [No]
Append DB from File
Configuration options: [Ok]
DBX Management
Load DBX from File
Configuration options: [Ok]
Copy DBX to File
Configuration options: [Ok]
Delete the DBX
Configuration options: [Yes] [No]
Append DBX from File
Configuration options: [Ok]
2.7.11
Boot Option Priorities
These items specify the boot device priority sequence from the available devices. The
number of device items that appears on the screen depends on the number of devices
installed in the system.
2.7.12
•
To select the boot device during system startup, press <F8> when ASUS Logo
appears.
•
To access Windows OS in Safe Mode, press <F8> after POST.
Boot Override
These items displays the available devices. The number of device items that appears on
the screen depends on the number of devices installed in the system. Click an item to start
booting from the selected device.
Chapter 2: BIOS information
2-29
2.8
Tools menu
2.8.1
ASUS EZ Flash 2 Utility
The Tools menu items allow you to configure options for special functions. Select an item
then press <Enter> to display the submenu.
Allows you to run ASUS EZ Flash 2. Press [Enter] to launch the ASUS EZ Flash 2 screen.
For more details, see section 2.1.2 ASUS EZ Flash 2.
2.8.2
ASUS SPD Information
DIMM Slot # [DIMM_A1]
Displays the Serial Presence Detect (SPD) information of the DIMM module installed on the
selected slot. Configuration options: [DIMM_A1] [DIMM_B1]
2.8.3
ASUS O.C. Profile
This item allows you to store or load multiple BIOS settings.
The Setup Profile Status items show Not Installed if no profile is created.
Label
Allows you to input the label of the setup profile.
Save to Profile
Allows you to save the current BIOS settings to the BIOS Flash, and create a profile. Key in a
profile number from one to eight, press <Enter>, and then select Yes.
Load from Profile
Allows you to load the previous BIOS settings saved in the BIOS Flash. Key in the profile
number that saved your CMOS settings, press <Enter>, and then select Yes.
2-30
•
DO NOT shut down or reset the system while updating the BIOS to prevent the
system boot failure!
•
We recommend that you update the BIOS file only coming from the same memory/
CPU configuration and BIOS version.
ASUS A55M-A Series
2.9
Exit menu
The Exit menu items allow you to load the optimal default values for the BIOS items, and
save or discard your changes to the BIOS items. You can access the EZ Mode from the Exit
menu.
Load Optimized Defaults
This option allows you to load the default values for each of the parameters on the Setup
menus. When you select this option or if you press <F5>, a confirmation window appears.
Select Yes to load the default values.
Save Changes & Reset
Once you are finished making your selections, choose this option from the Exit menu to
ensure the values you selected are saved. When you select this option or if you press <F10>,
a confirmation window appears. Select Yes to save changes and exit.
Discard Changes & Exit
This option allows you to exit the Setup program without saving your changes. When you
select this option or if you press <Esc>, a confirmation window appears. Select Yes to
discard changes and exit.
ASUS EZ Mode
This option allows you to enter the EZ Mode screen.
Launch EFI Shell from filesystem device
This option allows you to attempt to launch the UEFI Shell application (shellx64.efi) from one
of the available devices that have a filesystem.
Chapter 2: BIOS information
2-31
2-32
ASUS A55M-A Series
Appendices
Notices
Federal Communications Commission Statement
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions:
•
•
This device may not cause harmful interference.
This device must accept any interference received including interference that may cause
undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with manufacturer’s instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not occur
in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures:
•
Reorient or relocate the receiving antenna.
•
Connect the equipment to an outlet on a circuit different from that to which the receiver is
connected.
•
•
Increase the separation between the equipment and receiver.
Consult the dealer or an experienced radio/TV technician for help.
The use of shielded cables for connection of the monitor to the graphics card is required
to assure compliance with FCC regulations. Changes or modifications to this unit not
expressly approved by the party responsible for compliance could void the user’s authority
to operate this equipment.
IC: Canadian Compliance Statement
Complies with the Canadian ICES-003 Class B specifications. This device complies with RSS
210 of Industry Canada. This Class B device meets all the requirements of the Canadian
interference-causing equipment regulations.
This device complies with Industry Canada license exempt RSS standard(s). Operation is
subject to the following two conditions: (1) this device may not cause interference, and (2)
this device must accept any interference, including interference that may cause undesired
operation of the device.
Cut appareil numérique de la Classe B est conforme à la norme NMB-003 du Canada.
Cet appareil numérique de la Classe B respecte toutes les exigences du Règlement sur le
matériel brouilleur du Canada.
Cet appareil est conforme aux normes CNR exemptes de licence d’Industrie Canada. Le
fonctionnement est soumis aux deux conditions suivantes :
(1) cet appareil ne doit pas provoquer d’interférences et
(2) cet appareil doit accepter toute interférence, y compris celles susceptibles de provoquer
un fonctionnement non souhaité de l’appareil.
ASUS A55-M A Series
A-1
Canadian Department of Communications Statement
This digital apparatus does not exceed the Class B limits for radio noise emissions from
digital apparatus set out in the Radio Interference Regulations of the Canadian Department
of Communications.
This class B digital apparatus complies with Canadian ICES-003.
VCCI: Japan Compliance Statement
VCCI Class B Statement
KC: Korea Warning Statement
REACH
Complying with the REACH (Registration, Evaluation, Authorisation, and Restriction of
Chemicals) regulatory framework, we published the chemical substances in our products at
ASUS REACH website at http://csr.asus.com/english/REACH.htm.
DO NOT throw the motherboard in municipal waste. This product has been designed to
enable proper reuse of parts and recycling. This symbol of the crossed out wheeled bin
indicates that the product (electrical and electronic equipment) should not be placed in
municipal waste. Check local regulations for disposal of electronic products.
DO NOT throw the mercury-containing button cell battery in municipal waste. This symbol
of the crossed out wheeled bin indicates that the battery should not be placed in municipal
waste.
ASUS Recycling/Takeback Services
ASUS recycling and takeback programs come from our commitment to the highest standards
for protecting our environment. We believe in providing solutions for you to be able to
responsibly recycle our products, batteries, other components as well as the packaging
materials. Please go to http://csr.asus.com/english/Takeback.htm for detailed recycling
information in different regions.
A-2
Appendices
ASUS contact information
ASUSTeK COMPUTER INC.
Address
Telephone Fax E-mail
Web site
Technical Support
Telephone Online support
15 Li-Te Road, Peitou, Taipei, Taiwan 11259
+886-2-2894-3447
+886-2-2890-7798
info@asus.com.tw
www.asus.com.tw
+86-21-38429911
support.asus.com
ASUS COMPUTER INTERNATIONAL (America)
Address
Telephone
Fax
Web site
Technical Support
Telephone Support fax
Online support
800 Corporate Way, Fremont, CA 94539, USA
+1-812-282-3777
+1-510-608-4555
usa.asus.com
+1-812-282-2787
+1-812-284-0883
support.asus.com
ASUS COMPUTER GmbH (Germany and Austria)
Address
Fax
Web site
Online contact
Technical Support
Telephone
Support Fax
Online support
Harkort Str. 21-23, D-40880 Ratingen, Germany
+49-2102-959911
www.asus.de
www.asus.de/sales
+49-1805-010923*
+49-2102-9599-11
support.asus.com
* EUR 0.14/minute from a German fixed landline; EUR 0.42/minute from a mobile phone.
Manufacturer:
ASUSTeK Computer Inc.
Address:
4F, No.150, LI-TE RD., PEITOU, TAIPEI 112,
TAIWAN, R.O.C.
Authorised representative in
Europe:
ASUS Computer GmbH
Address:
HARKORT STR. 21-23, 40880 RATINGEN,
GERMANY
ASUS A55-M A Series
A-3
A-4
Appendices
(510)739-3777/(510)608-4555
800 Corporate Way, Fremont, CA 94539.
Asus Computer International
Signature :
Date :
Representative Person’s Name :
Jan. 23, 2013
Steve Chang / President
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Supplementary Information:
FCC Part 15, Subpart B, Unintentional Radiators
Conforms to the following specifications:
Model Number : A55M-A/USB3, A55M-A
Product Name : Motherboard
hereby declares that the product
Phone/Fax No:
Address:
Responsible Party Name:
Per FCC Part 2 Section 2. 1077(a)
DECLARATION OF CONFORMITY
Ver. 120601
Manufacturer:
TAIWAN
ASUS COMPUTER GmbH
HARKORT STR. 21-23, 40880 RATINGEN
GERMANY
Country:
Authorized representative in Europe:
Address, City:
Country:
A55M-A/USB3, A55M-A
Model name :
Declaration Date: Jan. 23, 2013
Year to begin affixing CE marking:2013
CE marking
2011/65/EU-RoHS Directive
Regulation (EC) No. 642/2009
Regulation (EC) No. 1275/2008
2009/125/EC-ErP Directive
EN 60950-1 / A12:2011
EN 60950-1 / A11:2009
2006/95/EC-LVD Directive
EN 300 328 V1.7.1(2006-10)
EN 300 440-1 V1.6.1(2010-08)
EN 300 440-2 V1.4.1(2010-08)
EN 301 511 V9.0.2(2003-03)
EN 301 908-1 V5.2.1(2011-05)
EN 301 908-2 V5.2.1(2011-07)
EN 301 893 V1.6.1(2011-11)
EN 302 544-2 V1.1.1(2009-01)
EN 302 623 V1.1.1(2009-01)
EN 300 330-1 V1.7.1(2010-02)
EN 300 330-2 V1.5.1(2010-02)
EN 50360:2001
EN 62479:2010
1999/5/EC-R &TTE Directive
EN 55022:2010
EN 61000-3-2:2006+A2:2009
EN 55013:2001+A1:2003+A2:2006
2004/108/EC-EMC Directive
Signature : __________
Position : CEO
Name :
Jerry Shen
(EC conformity marking)
Regulation (EC) No. 278/2009
EN 60065:2002 / A12:2011
EN 60065:2002 / A2:2010
EN 301 489-1 V1.9.2(2011-09)
EN 301 489-3 V1.4.1(2002-08)
EN 301 489-4 V1.4.1(2009-05)
EN 301 489-7 V1.3.1(2005-11)
EN 301 489-9 V1.4.1(2007-11)
EN 301 489-17 V2.1.1(2009-05)
EN 301 489-24 V1.5.1(2010-09)
EN 302 326-2 V1.2.2(2007-06)
EN 302 326-3 V1.3.1(2007-09)
EN 301 357-2 V1.4.1(2008-11)
EN 50385:2002
EN 62311:2008
EN 55024:2010
EN 61000-3-3:2008
EN 55020:2007+A11:2011
conform with the essential requirements of the following directives:
Motherboard
Product name :
declare the following apparatus:
4F, No. 150, LI-TE Rd., PEITOU, TAIPEI 112, TAIWAN
Address, City:
ASUSTeK COMPUTER INC.
EC Declaration of Conformity
We, the undersigned,
Ver. 121001